This type of reactivity has quickly become one of the cornerstones of modern catalysis .In a patent, Application In Synthesis of 1,5-Diphenylpenta-1,4-dien-3-one, name is 1,5-Diphenylpenta-1,4-dien-3-one, belongs to chiral-oxygen-ligands compound, introducing its new discovery. Application In Synthesis of 1,5-Diphenylpenta-1,4-dien-3-one
A diene-transmissive Diels-Alder reaction involving inverse electron-demand hetero-Diels-Alder cycloaddition of cross-conjugated azatrienes
The initial inverse electron-demand hetero-Diels-Alder reaction of N-sulfonyldivinylmethanimine with electron-rich dienophiles (ethyl vinyl ether and ethyl vinyl sulfide) affords [4+2] cycloadducts with high endo selectivity. The monocycloadducts then undergo a second Diels-Alder reaction on the newly formed diene unit with electron-deficient dienophiles (tetracyanoethylene, 4-phenyl-1,2,4-triazoline-3,5-dione, and N-phenylmaleimide) to give highly stereoselectively the crossed biscycloadducts, hexa- and octahydroquinolines, and octahydropyridopyridazines.
However, they have proven to be challenging because of the mutual inactivation of both catalysts. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 538-58-9
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