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Quality Control of cis-4-Aminocyclohexane carboxylic acid. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Competing fragmentation processes of β-substituted propanoate ions upon collision induced dissociation. Author is Le Blanc, Luc M.; Powers, Sean W.; Grossert, J. Stuart; White, Robert L..

Rationale : When subjected to collisional activation, gas-phase carboxylate ions typically undergo decarboxylation. However, alternative fragmentation processes dominate when the carboxylate group is located within certain structural motifs. In this work, the fragmentation processes of β-substituted carboxylate ions are characterized to improve correlations between reactivity and structure. Methods : Mass spectra were collected using both ion trap and triple quadrupole mass spectrometers operating in the neg. ion mode; collision induced dissociation (CID) of ions was used to study the relationship between product ions and the structures of their precursor ions. Quantum mech. computations were performed on a full range of reaction geometries at the MP2/6-311++G(2d,p)//B3LYP/6-31++G(2d,p) level of theory. Results : For a series of β-substituted carboxylate ions, a product ion corresponding to the anion of the β-substituent was obtained upon CID. Detailed computations indicated that decarboxylative elimination and at least one other fragmentation mechanism had feasible energetics for the formation of substituent anions differing in their gas-phase basicities. Predicted energetics for anti- and synperiplanar alignments in the transition structures for decarboxylative elimination correlated with the positions of crossover points in breakdown curves acquired for conformationally constrained ions. Conclusions : The feasibility of more than one mechanism was established for the fragmentation of β-substituted propanoates. The contribution of each mechanistic pathway to the formation of the substituent anion was influenced by structural variations and conformational constraints, but mostly depended on the nature of the substituent.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Triazine-Cored Lanthanide-Based Metal-Organic Frameworks Featuring Unique Water Chains and Strong Characteristic Emissions, published in 2019, which mentions a compound: 3685-23-2, Name is cis-4-Aminocyclohexane carboxylic acid, Molecular C7H13NO2, Quality Control of cis-4-Aminocyclohexane carboxylic acid.

A new triazine-cored tricarboxylic acid, N,N’,N”-1,3,5-triazine-2,4,6-triyltris(cis-4-aminocyclohexane-carboxylicacid)(H3L), was prepared by replacing the chlorine atoms of cyanuric chloride with cis-4-aminocyclohexane-carboxylic acid, which was used for the construction of a series of triazine-cored lanthanide-based metal-organic frameworks (MOFs). All these MOFs were structurally authenticated, revealing that they are isostructural and exist as two-dimensional (2D) coordination networks with the general formula [Ln(L)(H2O)2]·5.5 H2O (Ln = 1·Gd, 2·Tb, 3·Eu). A unique one-dimensional water chain, composed of primary tetrameric cyclic rings and dodecameric cyclic rings, was found entrapped in the lattice. Moreover, all these compounds display bright characteristic photoluminescence. Particularly, for 1, apart from the strong blue emission peak (Φf = 20.6 %) corresponding to the intraligand transition under near-UV excitation, the characteristic emissions of Gd3+ cation (Φf = 5.0 %) were unexpectedly observed upon excitation at 273 nm.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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HPLC of Formula: 3685-23-2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Preparation and properties of ruthenium catalysts of the liquid-phase hydrogenation of aromatic compounds. Author is Litvin, E. F.; Freidlin, L. Kh.; Gurskii, R. N.; Istratova, R. V.; Presnov, A. P..

The activity and sp. surface of 5% Ru catalysts increased in the order of supports SiO2 < γ-Al2O3 < C, but the specific activity per m2 surface was independent of the support or the method of catalyst preparation A catalyst prepared by treating C with Ru(OH)Cl3 at pH 5.9-6.1 followed by reduction with H at 300° or NaBH4 at 20° had the highest dispersion and specific activity by weight of those studied in the hydrogenation of p-H2NC6H4CO2- NH4+ (p-I). Hexahydroarom. acids were formed in 86-98% yield from m- and p-I, p-H2NCH2C6H4CO2- NH4+, p-Me3CC6H4CO2Na, ammonium isonicotinate and BzOH, and acenaphthene gave >90% perhydroacenaphthene at 80-145° and 60-80 atm.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3685-23-2, is researched, SMILESS is N[C@H]1CC[C@H](CC1)C(O)=O, Molecular C7H13NO2Journal, Journal of Organic Chemistry called Reductive cyclization of aminobenzoic acids, Author is Augustine, Robert L.; Vag, Linda A., the main research direction is aminobenzoic acid hydrogenation; cyclization reductive aminobenzoic acid; azabicyclooctanone; bicyclic lactam; bicyclic lactam.Recommanded Product: 3685-23-2.

Hydrogenation of m- and p-H2NC6H4CO2H over a Ru catalyst at 150°/1600 psig gave the bicyclic lactams I and II, resp. Cyclization also occurred on hydrogenation of 3,4-Me(H2N)C6H3CO2H. Hydrogenation of 3,4-(H2N)2C6H3CO2H resulted in loss of one of the NH2 groups; the 4-NH2 group was lost twice as readily as the 3-NH2 group. With 3,4-(HO)(H2N)C6H3CO2H, complete hydrogenolysis of the NH2 group occured.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Linear and cyclic peptides derived from p-aminobenzoic acid》. Authors are Langenbeck, Wolfgang; Weisbrod, Dieter.The article about the compound:cis-4-Aminocyclohexane carboxylic acidcas:3685-23-2,SMILESS:N[C@H]1CC[C@H](CC1)C(O)=O).Recommanded Product: cis-4-Aminocyclohexane carboxylic acid. Through the article, more information about this compound (cas:3685-23-2) is conveyed.

cf. CA 62, 13226b. The linear peptides N-carbobenzoxyglycyl-p-aminobenzoylglycyl-p-aminobenzoic acid (I), N-carbobenzoxy-ε-aminocaproyl-p-aminobenzoyl-ε-aminocaproic acid ethyl ester (II), and ε-aminocaproyl-p-aminobenzoyl-ε-aminocaproic acid (III) were obtained, using activated esters (method a) or the carbodiimide procedure (method b). The preparation of the cyclic peptides cyclo(ε-aminocapropyl-p-aminobenzoyl-ε-aminocaproyl-p-aminobenzoyl) (IV) and cyclo(11-aminoundecanoyl-p-aminobenzoyl) (V) was performed by cyclization of the corresponding linear peptides in diethyl phosphite with tetraethyl pyrophosphite as condensing agent. The formation of IV resulted probably from dimerization of the starting material. Because of the very small solubility of IV in all common solvents, it was impossible to determine the mol. weight p-Aminobenzoyl-ε-aminocaproic acid-HBr was prepared by hydrolysis of the N-carbobenzoxy compound To 4.1 g. N-carbobenzoxyglycyl-p-aminobenzoylglycine p-nitrophenyl ester in a mixture of 30 ml. tetrahydrofuran and 20 ml. Me2NCHO, a solution of 1.2 g. p-aminobenzoic acid and 0.35 g. NaOH in 10 ml. H2O was added. The mixture was refluxed 4 hrs. to yield 7.4% I, m. 297° (decomposition). For preparation of I using the mixed anhydride method, 3.3 g. N-carbobenzoxyglycyl-p-aminobenzoic acid, in 50 ml. tetrahydrofuran and 1.4 ml. Me3N, was treated with 1.31 ml. chlorocarbonic acid iso-Bu ester at -10°. To the reaction mixture, 2.75 g. glycyl-p-aminobenzoic acid-HBr in 20 ml. N NaOH was added and the mixture stirred 3 hrs. at 20° and 1 hr. at 40° to give 40% I. (Method a): To 3.8 g. carbobenzoxy-ε-aminocaproyl-p-aminobenzoic acid (VI) in 0.81 ml. pyridine and 50 ml. tetrahydrofuran, 1.35 ml. chlorocarbonic acid iso-Bu ester in 10 ml. tetrahydrofuran was added dropwise at -10° during 10 min., and stirring continued for 50 min. in the cold. ε-Aminocaproic acid ethyl ester-HCl (2 g.) in 10 ml. tetrahydrofuran and 0.81 ml. pyridine were added and the mixture was stirred 4 hrs. at 20° to give 28.8% II, m. 134°. (Method b) VI (3.8 g.) was dissolved in 50 ml. tetrahydrofuran, 2 g. ε-aminocaproic acid ethyl ester-HCl in 0.81 ml. pyridine and 2.1 g. dicyclohexylcarbodiimide in 5 ml. tetrahydrofuran added, and the mixture kept 24 hrs. at 20° to give 66.7% II. II (5.3 g.) was treated for 30 min. at 20° with 10 ml. HBr-HOAc to give 80.5% ε-aminocapropyl-p-aminobenzoyl-ε-aminocaproic acid ethyl ester-HBr (VII), m. 177-9°. VII (2.4 g.) was refluxed for 2 hrs. with 75 ml. Ba(OH)2 solution to give 7.2% III, m. 233° (decomposition). For cyclization, 1.324 g. ε-aminocaproyl-p-aminobenzoic acid-HBr (VIII) was dissolved in 1 l. diethyl phosphite, then 0.4 ml. pyridine and 4.85 ml. tetraethyl pyrophosphite added. The reaction mixture was stirred for 4 hrs. at 140° under N. Diethyl phosphite was distilled in vacuo, and the residue heated for 1 hr. with 100 ml. H2O and 1 l. MeOH. A white precipitate of linear oligopeptides with high mol. weight was filtered off, and 900 ml. H2O added to the filtrate, whereby further linear oligomers were precipitated, and removed by filtration. The filtrate was passed through an ion exchanger (Wofatit KPS 200, anionic, Wofatit L 150, cationic) and concentrated to 50 ml. in vacuo to give 22.6% IV, m. ∼380° (decomposition). Cyclization of VIII in the presence of tetraethyl pyrophosphite and 1.4 g. imidazole gave 23.2% IV. 11-Aminoundecanoyl-p-aminobenzoic acid-HBr (IX) [prepared in 94% yield from N-carbobenzoxy-11-aminoundecanoyl-p-aminobenzoic acid by hydrolysis with HBr-AcOH, m. 236-8° (decomposition)] (1.604 g.) in l. diethyl phosphite in the cold was treated with 0.4 ml. pyridine and 4.85 ml. tetraethyl pyrophosphite to give 23.6% V, m. 218-20°. Cyclization of IX with equivalent amounts of tetraethyl pyrophosphite and imidazole gave 21.7% IV. N-Carbobenzoxy-p-aminobenzoyl-ε-aminocaproic acid (3.8 g.) was hydrolyzed for 30 min. at 20° with 15 ml. HBr-AcOH to give 57.4% p-aminobenzoyl-ε-aminocaproic acid-HBr, m. 160°. N-Carbobenzoxy-11-aminoundecanoyl-p-aminobenzoic acid was hydrolyzed with HBr-AcOH to give 64.6% raw 11-aminoundecanoyl-p-aminobenzoic acid, m. 204-7°. p-Aminobenzoic acid was dissolved in AcOH and hydrogenated with PtO2 at 20° and atm. pressure. After 1/3 of the theoretical amount of H was absorbed, addnl. PtO2 was added. This procedure was repeated several times. When 80% of the theoretical amount of H was absorbed, the hydrogenation was stopped, and the reaction mixture worked up to give 20.9% cis-hexahydro-p-aminobenzoic acid.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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Computed Properties of C7H13NO2. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Synthesis of analogs of N-(2-chloroethyl)-N’-(trans-4-methylcyclohexyl)-N-nitrosourea for evaluation as anticancer agents.

Of several nitrosourea derivatives [X(CH2)2N(NO)CONHR (X = Cl, F; R = substituted cyclohexyl, 2-methyl-1,3-dithian-5-yl or its S, S, S’, S’-tetraoxide)] prepared and tested against murine leukemia L210 almost all were active, giving cure rates ≥50% at ≤LD10 doses. In 4 of the 5 fluoroethyl analogs activity was clearly inferior to the corresponding chloroethyl compounds Most of the more active analogs contained a 4-substituted cyclohexyl group. Activity in relation to structure, partition coefficient, and cis-trans isomerism is discussed.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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Application of 3685-23-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Renin inhibitory pentols showing improved enteral bioavailability. Author is Kleemann, Heinz Werner; Heitsch, Holger; Henning, Rainer; Kramer, Werner; Kocher, Walter; Lerch, Ulrich; Linz, Wolfgang; Nickel, Wolf Ulrich; Ruppert, Dieter.

Aminopentols derived from L-(+)-glucose and D-(+)-mannose were prepared and tested for renin-inhibiting activity as well as bioavailability. Incorporation of a C-terminal pentahydroxy functionality led to potent, low mol. weight hydrophilic renin inhibitors lacking the p1′ side chain. I was transported across rabbit intestinal brush border membrane vesicles and yielded a hypotensive effect in sodium-depleted rhesus monkeys which lasted for 90 min when dosed at 2 mg/kg, intraduodenally.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Activation of the amide group by acylation. V. Inclusion of amino acid residues into linear and cyclic peptides》. Authors are Antonov, V. K.; Agadzhanyan, Ts. E.; Telesnina, T. R.; Shemyakin, M. M..The article about the compound:cis-4-Aminocyclohexane carboxylic acidcas:3685-23-2,SMILESS:N[C@H]1CC[C@H](CC1)C(O)=O).Computed Properties of C7H13NO2. Through the article, more information about this compound (cas:3685-23-2) is conveyed.

cf. CA 63, 16255f. Dipeptides and lactams acylated at the amide-N by amino acid residues were shown to isomerize to give corresponding linear or cyclic peptides through intermediate azocyclols, which can also undergo dehydration to form acylamidines. The transannular interaction of amide groups in 9-10-membered cyclopeptides can also result in similar acylamidines; such a process takes place during mass spectrometry of cyclopeptides. N-Phthaloylglycylglycine Et ester and azidoacetyl chloride refluxed in MePh 10 hrs. gave after filtration and evaporation 46% N-azidoacetyl-N’-phthaloylglycylglycine Et ester, m. 115-16°. Similarly were prepared 36% N-azidoacetyl-N’-phthaloylglycyl-L-leucine Et ester, m. 118-19°. The former treated with 28% HBr in AcOH overnight in the cold, diluted with Et2O, and the resulting precipitate (I) treated with Et3N in tetrahydrofuran gave 70% N-phthaloylglycylglycylglycine Et ester, m. 228-9°. Similarly was prepared N-phthaloylglycylglycyl-L-leucine Et ester, m. 155-6°. I and H2O in 5 min. gave 73% 2-phthaloylaminomethyl-3-carbethoxymethyl-Δ1-imidazolin-4-one, m. 153-4°. Similarly was obtained 63% 2-phthaloylaminomethyl-3-(1-carbethoxy-3-methylbutyl)-Δ1-imidazolin-4-one, m. 117-18°. Carbobenzoxy-β-alanyl chloride and butyrolactam in Et2O were treated at 5° with Et3N to yield in 1 day at 20° 58% N-carbobenzoxy-β-alanylbutyrolactam (II), m. 94-5°. Similar reaction with valerolactam gave N-carbobenzoxy-β-alanylvalerolactam, m. 60-1°. Similarly was prepared 50% N-carbobenzoxy-β-alanylcaprolactam, m. 60-1°. II hydrogenated over Pd in Et2O gave 38% cyclo(β-alanyl-γ-aminobutyryl) (III), m. 173°, also formed from II by treatment with 27% HBr in AcOH 45 min.; HBr salt m. 119-20°. Similarly was obtained cyclo(β-alanyl-δ-aminovaleryl) (IV), m. 187°, and 61% cyclo(β-alanyl-ε-aminocaproyl) (V), m. 259°. III heated in xylene 1 hr. under azeotropic conditions of H2O removal gave 68% 1,2-trimethylene-6-oxo-1,4,5,6-tetrahydropyrimidine (IIIa), b12 152-4°. IV similarly gave 45% 1,2-tetramethylene-6-oxo-1,4,5,6-tetrahydropyrimidine (IVa), b12 160° (no reaction took place in ο-Cl2C6H4 in 4 hrs. with V). III heated with H2O 5 min. gave 80% N-[1-aza-1-cyclopenten-2-yl]-3-aminopropionic acid (VI), decomposed 186-7°. H2NCH2CH2CO2H in MeOH was treated with O-methylbutyrolactam and gave after heating 10 min. 97% VI. Similarly O-methylvalerolactam gave 95% N-[1-aza-1-cyclohexen-2-yl]-3-aminopropionic acid, m. 186°, which heated with removal of H2O in Cl2C6H4 gave 91% IVa. Similarly O-methylcaprolactam gave 93% N-[1-aza-1-cyclohepten-2-yl]-3-aminopropionic acid, m. 200-1°, which heated in Cl2C6H4 gave 12% cyclo(β-alanyl-ε-aminocapropyl) and 80% 1,2-pentamethylene-6-oxo-1,4,5,6-tetrahydropyrimidine, b10 185-90°, m. 35°. Heating VI in xylene with removal of H2O gave IIIa. The latter kept with H2O 2 days gave VI, while H2O-Ag2O gave 32% VI and 54% cyclo(β-alanyl-γ-aminobutyryl). The above analogs of VI reacted similarly.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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Application In Synthesis of cis-4-Aminocyclohexane carboxylic acid. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Highly selective preparation of trans-4-aminocyclohexanecarboxylic acid from cis-isomer over Raney nickel catalyst. Author is Gobolos, Sandor; Banka, Zoltan; Toth, Zoltan; Szammer, Janos; Margitfalvi, Jozsef L..

4-Amino-benzoic acid was hydrogenated to 4-aminocyclohexanecarboxylic acid over alumina supported 5 weight% Ru and Rh catalysts. Complete ring saturation was achieved in 2 weight % NaOH-H2O at 80-100 °C, 10 MPa H2, and 5 h however, the ratio of trans/cis stereoisomers of the product was only between 1/3-1/1. The raw reaction mixture was further processed in the presence of a com. Raney nickel catalyst at 130°C, 100 bar H2 for 5 h. In this alkali-mediated isomerization the trans/cis isomer ratio was 7/3. The cis isomer was isolated by fractional crystallization, and then reacted on Raney nickel catalysts in 2%NaOH-H2O at 120-140°C, 1 MPa H2 for 5 h to obtain the trans isomer with a yield of ca. 70%. The two-step synthesis resulted in trans-4-aminocyclohexanecarboxylic acid with a yield above 90%. Catalytic tests were performed in a high-throughput reactor system equipped with 16 mini autoclaves.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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Formula: C7H13NO2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Synthesis and properties of 2-azabicyclo[2:2:2]octan-3-one and 6-azabicyclo[3:2:1]octan-7-one. Author is Palaima, A.; Staniulyte, Z.; Klimavicius, A..

Optimal reaction conditions for the synthesis of lactams of cis-3- and -4-ACH acids and their derivatives were determined 1H NMR spectral data confirmed different configuration of lactams of cis-3- and cis-4-derivatives Possibility to apply lactams for the separation of cis- and trans-isomers was investigated.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate