通过P/N 杂配 Cu( I ) 光敏剂催化的多米诺自由基中继成环过程,实现了由 1,6-烯炔和芳基重氮盐组成的苯并[ b ]芴酮的可见光驱动光催化结构。初步机理研究表明,在Cu( I )-光敏剂的激发态下,由芳基重氮盐原位产生的芳基自由基在高度稠合苯并[ b ]的简洁构建中发挥自由基引发剂和自由基终止剂的双重作用。芴酮支架。
Chemoselectivities in the Platinum-Catalyzed Hydrative Carbocyclizations of Oxo-Alkyne-Nitrile Functionalities
作者:Anupam Mukherjee、Rai-Shung Liu
DOI:10.1021/ol1029047
日期:2011.2.18
Two new hydrativecarbocyclizations of oxa-alkyne-nitrile functionalities are reported to produce distinct nitrogen-containing heterocycles. Protracted heating of oxoalkynyl nitrile substrates with PtCl2/CO/H2O in hot 1,4-dioxane gave 2,3-dihydro-1H-pyrido[1.2-b]-isoquinolin-4(6H)-ones. In this hydration reaction, dicarbonyl nitrile intermediates were isolated efficiently after a brief period, and
据报道,氧-炔烃-腈官能团的两个新的水合碳环化反应产生了独特的含氮杂环。在热的1,4-二恶烷中用PtCl 2 / CO / H 2 O长时间加热氧代炔基腈底物,得到2,3-二氢-1 H-吡啶基[1.2 - b ]-异喹啉-4(6 H)-。在该水合反应中,短暂地有效分离出二羰基腈中间体,然后将其进行基于NHC的交叉安息香偶合,得到螺环醇,并进一步与TfOH反应生成螺环[indene-2,2'-哌啶]。-1,6 ′(3 H)-二酮。
Transition-metal-free approaches to 2,3-diarylated indenones from 2-alkynylbenzaldehydes and phenols with tunable selectivity
The first transition-metal-free synthesis of 2,3-diarylindenones with tunable selectivity via tandem annulation of 2-alkynylbenzaldehydes with phenols has been developed.