Diastereoselectively Complementary C–H Functionalization Enables Access to Structurally and Stereochemically Diverse 2,6-Substituted Piperidines
作者:Gang Wang、Ying Mao、Lei Liu
DOI:10.1021/acs.orglett.6b03372
日期:2016.12.16
The preparation of 2,6-substituted piperidine derivatives through diastereoselective C–H functionalization of corresponding nitrogen heterocycles represents an appealing protocol and yet remains a formidable challenge. Here, we describe a stereochemically complementary oxidative C–H functionalization of N-carbamoyl tetrahydropyridines with a wide variety of building blocks, providing either the cis-
The Lewis acid promotedallylation of aldehydes has become an important carbon−carbon bond forming reaction in organic chemistry. In this context, we have developed an alternative over existing catalytic processes, wherein aldehydes are subject in acetonitrile to reaction of allylation with allyltributylstannane in the presence of 1.0 equiv of cerium(III) chloride heptahydrate (CeCl3·7H2O), an inexpensive