Relay Organophotoredox/<i>N</i>-Heterocyclic Carbene Catalysis-Enabled Asymmetric Synthesis of Dibenzoxazepine-Fused Pyrrolidinones
作者:Yaseen Hussain、Deepak Sharma、Tamanna、Pankaj Chauhan
DOI:10.1021/acs.orglett.3c00685
日期:2023.4.14
An unprecedented highly stereoselective synthesis of pyrrolo[1,2-d][1,4]oxazepin-3(2H)-ones has been accomplished via photoredox/N-heterocyclic carbene (NHC) relay catalysis. A wide range of substituted dibenzoxazepines and aryl/hetereoaryl enals were well accommodated under the organic photoredox catalysis-promoted amine oxidation to generate the imines, followed by a NHC-catalyzed [3 + 2] annulation
通过光氧化还原/ N-杂环卡宾 (NHC) 中继催化,实现了前所未有的高度立体选择性合成吡咯并 [1,2- d ][1,4]oxazepin-3(2 H )-ones。有机光氧化还原催化促进胺氧化生成亚胺,然后进行 NHC 催化的 [3 + 2] 环化反应,以实现优异的非对映和对映选择性二苯并恶氮杂合吡咯烷酮。