Category: chiral-oxygen-ligands

Related Products of 3685-23-2. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Proton NMR spectroscopic study of the stereoconfiguration and conformation of cis and trans isomers of 3- and 4-aminocyclohexylalkanoic acids. Author is Palaima, A.; Staniulyte, Z.; Juodvirsis, A..

1H NMR spectral data for cyclohexane H1, H3 or H1, H4 protons of cis- and trans-3- and 4-aminocyclohexanealkanoic acids were successfully used for determination of the stereoconfigurations and conformational equilibrium of sep. isomers and for determination of cis/trans ratio in their mixtures by using Pr(NO3)3 and Eu(fod)3 as shift-reagents. For that purpose NMR data of the alkanoic substituents of the cyclohexane ring can also be used.

In some applications, this compound(3685-23-2)Related Products of 3685-23-2 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Ikawa, Takashi; Takagi, Akira; Kurita, Yurio; Saito, Kozumo; Azechi, Kenji; Egi, Masahiro; Kakiguchi, Keisuke; Kita, Yasuyuki; Akai, Shuji published the article 《Preparation and regioselective Diels-Alder reactions of borylbenzynes: synthesis of functionalized arylboronates》. Keywords: Diels Alder cycloaddition iodophenol triflate boryl benzyne furan pyrrol; benzyne generation pinacolboryl substituted iodophenol triflate furan pyrrol cycloaddition; boronate naphthyl preparation epoxy imino Diels Alder cycloaddition benzyne; aromatic amine phenol boronate preparation cycloaddition benzyne furan pyrrol; regioselective Diels Alder cycloaddition arylboronate benzyne furan pyrrol.They researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Reference of 3-Methyl-1H-pyrrole. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:616-43-3) here.

1,3,2-Dioxaborolan-2-yl benzynes, generated from 2-Bpin-4-R1-6-iodophenol triflates [6a-d; Bpin = B(OCMe2)2] undergo regioselective Diels-Alder cycloaddition with 2-R2-furans and 2-R2-4-R3-1-R4-1H-pyrroles, yielding the corresponding functionalized boronates I (4a-m; R1 = H, Me, Br, CO2Me; R2 = Me, Bu, tBu, SiMe3, SnBu3, CO2Me, COMe, CN, Ph, OMe) and II (same R1, R2 = H, Et, CH2CH2Ph; R3 = H, Me; Z = NTs, NBoc) with high yields and 87-98% regioselectivities. The benzyne formation was promoted by iPrMgCl/LiCl reagent. The boronate group was successfully converted into butylamino, hydroxy and Ph groups following common procedures.

In some applications, this compound(616-43-3)Reference of 3-Methyl-1H-pyrrole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Recommanded Product: 616-43-3. 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: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Deprotonation of Methyl-Substituted, Five-Membered Aromatic Molecules: A Surprising Case of Mixed Conjugation, Rehybridization, and Induction Contributions. Author is Mo, Yirong; Ahmed, Basil M.; Guan, Liangyu; Karty, Joel; Mezei, Gellert.

Methyl-substituted, six-membered aromatic mols. are deprotonated to benzylic carbanions, which are stabilized by π conjugation. In contrast, deprotonation of 3(5)-methylpyrazole (NH protected) occurs at an endocylic CH group. Computational analyses showed that the reduction of π conjugation in substituted five-membered rings plays a major role, while the reduced bond angles, in addition to the strengthened induction of Csp2 vs. Csp3, further favor the deprotonation of endocyclic carbon sites rather than that of the Me group.

In some applications, this compound(616-43-3)Recommanded Product: 616-43-3 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Name: 3-Methyl-1H-pyrrole. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Pyrolysis of fast-growing aquatic biomass -Lemna minor (duckweed): Characterization of pyrolysis products. Author is Muradov, Nazim; Fidalgo, Beatriz; Gujar, Amit C.; T-Raissi, Ali.

The aim of this work was to conduct the exptl. study of pyrolysis of fast-growing aquatic biomass -Lemna minor (commonly known as duckweed) with the emphasis on the characterization of main products of pyrolysis. The yields of pyrolysis gas, pyrolytic oil (bio-oil) and char were determined as a function of pyrolysis temperature and the sweep gas (Ar) flow rate. Thermogravimetric/differential thermogravimetric (TG/DTG) analyses of duckweed samples in inert (helium gas) and oxidative (air) atm. revealed differences in the TG/DTG patterns obtained for duckweed and typical plant biomass. The bio-oil samples produced by duckweed pyrolysis at different reaction conditions were analyzed using GC-MS technique. It was found that pyrolysis temperature had minor effect on the bio-oil product slate, but exerted major influence on the relative quantities of the individual pyrolysis products obtained. While, the residence time of the pyrolysis vapors had negligible effect on the yield and composition of the duckweed pyrolysis products.

In some applications, this compound(616-43-3)Name: 3-Methyl-1H-pyrrole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Reference of 3-Methyl-1H-pyrrole. 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: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about First example of predominant β-orientation in electrophilic substitution of pyrrole.

Electrophilic substitution of pyrrole with 3HeT+, Me2F+, and Me3C+ in the gas phase occurred predominantly at the β-C atom. E.g., gas-phase reaction of pyrrole with Me3C+, generated by radiolysis of CMe4, gave a 7:21:72 mixture of N-, α-, and β-tert-butylpyrrole.

In some applications, this compound(616-43-3)Reference of 3-Methyl-1H-pyrrole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

COA of Formula: C5H7N. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Intermediate pyrolysis and product identification by TGA and Py-GC/MS of green microalgae and their extracted protein and lipid components. Author is Kebelmann, Katharina; Hornung, Andreas; Karsten, Ulf; Griffiths, Gareth.

The thermo-chem. conversion of green microalgae Chlamydomonas reinhardtii wild type (CCAP 11/32C), its cell wall deficient mutant C. reinhardtii CW15+ (CCAP 11/32CW15+) and Chlorella vulgaris (CCAP 211/11B) as well as their proteins and lipids was studied under conditions of intermediate pyrolysis. The microalgae were characterized for ultimate and gross chem. composition, lipid composition and extracted products were analyzed by Thermogravimetric anal. (TG/DTG) and Pyrolysis-gaschromatog./mass-spectrometry (Py-GC/MS). Proteins accounted for almost 50% and lipids 16-22 % of dry weight of cells with little difference in the lipid compositions between the C. reinhardtii wild type and the cell wall mutant. During TGA anal., each biomass exhibited three stages of decomposition, namely dehydration, devolatilization and decomposition of carbonaceous solids. Py-GC/MS anal. revealed significant protein derived compounds from all algae including toluene, phenol, 4-methylphenol, 1H-indole, 1H-indole-3methyl. Lipid pyrolysis products derived from C. reinhardtii wild type and C. reinhardtii CW15+ were almost identical and reflected the close similarity of the fatty acid profiles of both strains. Major products identified were phytol and phytol derivatives formed from the terpenoid chain of chlorophyll, benzoic acid alkyl ester derivative, benzenedicarboxylic acid alkyl ester derivative and squalene. In addition, octadecanoic acid octyl ester, hexadecanoic acid Me ester and hydrocarbons including heptadecane, 1-nonadecene and heneicosane were detected from C. vulgaris pyrolyzed lipids. These results contrast sharply with the types of pyrolytic products obtained from terrestrial lignocellulosic feedstocks and reveal that intermediate pyrolysis of algal biomass generates a range of useful products with wide ranging applications including bio fuels.

In some applications, this compound(616-43-3)COA of Formula: C5H7N is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

HPLC of Formula: 3685-23-2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Investigating the Stability of Double Head to Tail Dimers and Ribbons in Multicomponent Crystals of cis-4-Aminocyclohexanecarboxylic Acid with Water and Oxalic Acid. Author is Mora, Asiloe J.; Belandria, Lusbely M.; Avila, Edward E.; Seijas, Luis E.; Delgado, Gerzon E.; Miro, Aira; Almeida, Rafael; Brunelli, Michela; Fitch, Andrew N..

The current contribution aims to study the stability of commonly occurring motifs present in certain amino acid structures after introducing addnl. mols. to form multicomponent crystals. The crystal structures of the amino acid cis-4-aminocyclohexanecarboxylic acid hemihydrate I and dehydrate II forms and that of its oxalate salt cocrystd. with oxalic acid III, were studied employing a combination of techniques. Both single-crystal and powder x-ray diffraction were used to solve the structures, while temperature-control powder X-ray diffraction was used to follow the dehydration of I. Regardless of the added mols. that induce modifications of the intermol. interactions within the crystals, some recurring supramol. structures were identified: double head to tail dimers, graph symbol R22(16), and ribbons, graph symbol R22(16)R34(10). Stabilities of these supramol. motifs were studied using theor. modeling with DFT/B3LYP/6-31++G (d,p) and PM6-D2H calculations The theor. calculations reproduced the exptl. findings, confirming the extraordinary stability of these motifs. The mol. recognition of amino acid pairs to form double head to tail-dimers is undoubtedly the initial driving force for the crystal formation in all the three crystals studied.

In some applications, this compound(3685-23-2)HPLC of Formula: 3685-23-2 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Pyrrole Syntheses from Amino Ketones with Ketones and Ketone Esters》. Authors are Piloty, O.; Hirsch, P..The article about the compound:3-Methyl-1H-pyrrolecas:616-43-3,SMILESS:CC1=CNC=C1).SDS of cas: 616-43-3. Through the article, more information about this compound (cas:616-43-3) is conveyed.

The following pyrrole derivatives have been prepared by treating aqueous solutions of the HCl salts of amino ketones containing an excess of alk. with a ketone or ketone ester and allowing to stand a long time at a slightly elevated temperature in closed vessels. α-β’-Dimethylpyrrole, from Ac2NH2.HCl and AcMe; yield, 30%. α-Phenyl-β’-methylpyrrole, from 10 g. AcCH2NH2.HCl and 5 g. AcPh, m. 152°; yield, 1 g. α,β,β’-Trimethylpyrrole, from AcEt; yield, 28%. α-Ethyl-β,β’-dimethylpyrrole, b10 77-8° (yield, 0.4 g. from 14 g. AcCH3NH2.HCl and 10 g. Et2CO); picrjate, bright yellow, striated prisms, m. 122.5°. α,β,α’-Trimethylpyrrole, from AcCHMeNH2 and AcMe; yield, 50%. Some tetramethylpyrazine is formed in this reaction. AcCHMeNH2 and AcEt react only slowly and incompletely; the chief product is the pyrazine, but a little α,β,α’,β’-tetramethylpyrrole picrate (cf. Fischer and Bartholomäus, C. A., 7, 780) was isolated. Et α,β’-dimethylpyrrole-β-carboxylate, from AcCH2NH2 and AcCH2CO2Et. Monoethyl β-methylpyrrole-α’,β’-dicarboxylate, from 19 g. HO2CCOCH2CO2Et and 11 g. AcCH2NH2.HCl, monoclinic prisms, m. 196° (yield, 2-3 g.), converted by 20 hrs. b. with excess of 20% KOH into β-methylpyrrole-β’ (or α’)-carboxylic acid, flocks, m. 149°, losing CO2 and forming β-methylpyrrole, b11 45°. Monoethyl α,β-dimethylpyrrole-α’,β’-dicarboxylate, from AcCHMeNH2 and HO2CCOCH2CO2Et, prisms, m. 201° (loss of CO2). α,β-Dimethylpyrrole-β’ (or α’)-carboxylic acid, m. 188°. α,β-Dimethylpyrrole, b11 62°; picrate, bright yellow, felted needles, m. 146-5°; contrary to all other pyrrole derivatives, it has the comp. C18H21O7N5, i. e., 2 mols. pyrrole: 1 mol. picric acid.

In some applications, this compound(616-43-3)SDS of cas: 616-43-3 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Safety of 5,6-Dichloropyrazine-2,3-dicarbonitrile. 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: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Multivalent Allyl-Substituted Macrocycles as Nonaggregating Building Blocks. Author is Husain, Ali; Ganesan, Asaithampi; Ghazal, Basma; Makhseed, Saad.

Based on the concept of dual-directionality, the synthesis of two novel zinc(II)-containing phthalocyanine (Pc-ene1) and azaphthalocyanine (AzaPc-ene1) macrocycles bearing dual directional (up/down) allyl moieties on their rims is reported. Their structural identification, i.e., NMR, FT-IR, UV-vis, MALDI-TOF spectral data, single crystal x-ray diffraction, and CHN elemental analyses, along with their nonaggregating behaviors in solvated media and crystalline forms has been confirmed.

In some applications, this compound(56413-95-7)Safety of 5,6-Dichloropyrazine-2,3-dicarbonitrile is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Thermal reactions of organic nitrogen compound. I. I-Methylpyrrole》. Authors are Jacobson, I. A. Jr.; Heady, H. H.; Dinneen, G. U..The article about the compound:3-Methyl-1H-pyrrolecas:616-43-3,SMILESS:CC1=CNC=C1).Application In Synthesis of 3-Methyl-1H-pyrrole. Through the article, more information about this compound (cas:616-43-3) is conveyed.

A flow method was used at 475-700°. At 475-575° the reaction was a homogeneous 1st-order isomerization, 1-methylpyrrole → 2-methylpyrrole → 3-methylpyrrole. The Arrhenius equation for this reaction, based on the disappearance of 1-methylpyrrole, is k = 2.39 × 1012e(-54,800/RT). Above 575° there was decomposition to give a complex mixture of reaction products.

In some applications, this compound(616-43-3)Application In Synthesis of 3-Methyl-1H-pyrrole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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