Switching Regioselectivity in the Allylation of Imines by N-Side Chain Tuning
摘要:
A spectacular inversion of alpha- to gamma-regioselectivity in the allylzincation of imines can be achieved by fine-tuning of the N-side chain. This approach allows easy preparation of regioisomeric amines, in racemic as well as enantiopure forms. The usefulness of the method is illustrated by the parallel asymmetric syntheses of 2,3- and 2,5-diphenylpyrrolidines.
Switching Regioselectivity in the Allylation of Imines by N-Side Chain Tuning
摘要:
A spectacular inversion of alpha- to gamma-regioselectivity in the allylzincation of imines can be achieved by fine-tuning of the N-side chain. This approach allows easy preparation of regioisomeric amines, in racemic as well as enantiopure forms. The usefulness of the method is illustrated by the parallel asymmetric syntheses of 2,3- and 2,5-diphenylpyrrolidines.
Dramatic lithium chloride effect on the reaction stereocontrol in Zn-mediated asymmetric cinnamylation: highly practical synthesis of β-aryl homoallylic amines
作者:Min Liu、An Shen、Xing-Wen Sun、Fei Deng、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1039/c0cc03230a
日期:——
An extremely mild and practical approach for the preparation of enantiomerically enriched beta-aryl substituted homoallylic amines bearing two adjacent stereogeniccenters was realized by room temperature zinc-mediated highlystereoselective cinnamylation of N-sulfinyl imines.