Enantiopure 2-piperidylacetaldehyde as a useful building block in the diversity-oriented synthesis of polycyclic piperidine derivatives
摘要:
Novel, simple, and convenient strategies for diversely functionalized piperidine derivatives have been developed by using different metal catalyzed reactions starting from enantiopure (R)- and (S)-2-piperidylacetaldehyde. (C) 2011 Elsevier Ltd. All rights reserved.
Borane‐Catalyzed Asymmetric Reduction of 2‐Alkylpyridines†
作者:Heng Luo、Zhao‐Ying Yang、Ming Zhang、Xiao‐Chen Wang
DOI:10.1002/cjoc.202400671
日期:2024.12
Herein, a method for the enantioselective reduction of unprotected 2-alkylpyridines is reported for the first time. By using pinacolborane and an amide as reducing agents, a large number of 2-alkylpiperidines were synthesized with high yields and excellent enantioselectivities via a cascade process involving 1,4-hydroboration and subsequent transfer hydrogenation. The resulting products can be easily