Platinum(<scp>ii</scp>) photo-catalysis for highly selective difluoroalkylation reactions
作者:Jian-Ji Zhong、Chen Yang、Xiao-Yong Chang、Chao Zou、Wei Lu、Chi-Ming Che
DOI:10.1039/c7cc03823b
日期:——
difluoroalkylation of cinnamic acids and alkynes for selective construction of E-,Z-difluoroalkyl alkenes and difluoroalkyl alkenyl iodides, respectively, were achieved under mild conditions. The high efficiency, good substrate scope and high selectivity altogether highlight the prospect of Pt(II) photocatalysts in visible-light-driven organic transformation reactions.
The reaction of readily available E-allyl difluorides (R1CH = CHCF2COR2) containing a CF2COR2 moiety with arylboronic acids catalyzed by a chiral diene-rhodium complex gives high yields of chiral monofluoroalkenes (R1ArC*HCH = CFCOR2) with perfect enantioselectivity (enantiomeric excess (ee) of > 99% in all cases) and high level of Z/E selectivity (up to 20:1). The reaction is proposed to proceed through
Photoredox/Copper-Catalyzed One-Pot Aminoalkylation/Cyclization of Alkenes with Primary Amines to Synthesize Polysubstituted γ-Lactams
作者:Li-Xin Li、Chen-Rui Li、Xu Guo、Zhenqiang Zhang
DOI:10.1021/acs.orglett.3c03974
日期:2024.2.2
Visible-light-driven chemical transformation has emerged as a powerful tool for the synthesis of γ-lactams. However, during this transformation, the α-bromoimides need to be pre-prepared. Herein, we report a photoreodox/copper-catalyzed one-pot three-component reaction of alkenes with primary amines for the construction of γ-lactams. In this transformation, the orthoquinones were generated via a photocatalytic