Multistep Microwave-Assisted Solvent-Free Organic Reactions: Synthesis of 4-Oxo-tetrahydro-pyridine
摘要:
Preparation and ring-closure of 2-dimethylaminomethylene-5-substituted-3-oxo-pent-4-enoic acid benzyl esters to dihydropyridine rings are efficiently and quickly carried out under solvent-free conditions in an open-vessel microwave system. The syntheses of 1,6-disubstituted-4-oxo-1,4,5,6-tetrahydro-pyridine-3-carboxylic acid benzyl esters are reported.
Copper(I)‐Catalyzed Asymmetric Conjugate 1,6‐, 1,8‐, and 1,10‐Borylation
作者:Chang‐Yun Shi、Jungmin Eun、Timothy R. Newhouse、Liang Yin
DOI:10.1002/anie.202016081
日期:2021.4.19
Catalytic asymmetric remote conjugate borylation is challenging as the control of regioselectivity is not trivial, the electrophilicity of remote sites is extenuated, and the remote asymmetric induction away from the carbonyl group is difficult. Herein, catalytic asymmetric conjugate 1,6‐, 1,8‐ and 1,10‐borylation was developed with excellent regioselectivity, which delivered α‐chiral boronates in moderate