Synthesis of Pyrido[2,1-<i>b</i>]quinazolin-11-ones and Dipyrido[1,2-a:2′,3′-<i>d</i>]pyrimidin-5-ones by Pd/DIBPP-Catalyzed Dearomatizing Carbonylation
作者:Tongyu Xu、Howard Alper
DOI:10.1021/acs.orglett.5b00452
日期:2015.3.20
1-b]quinazolin-11-ones were obtained from N-(2-bromophenyl)pyridine-2-amines in up to quantitative yield and dipyrido[1,2-a:2′,3′-d]pyrimidin-5-ones from 3-bromo-N-(pyridine-2-yl)pyridine-2-amines in up to 84% yield. The cyclocarbonylation can be also realized without isolation of compound 1 and additional palladium catalyst.
通过使用1,3-双(二异丁基膦基)丙烷(DIBPP)作为配体的钯催化的脱芳构羰基化反应,可以轻松合成N杂环。从N-(2-溴苯基)吡啶-2-胺中定量获得吡啶并[2,1- b ]喹唑啉-11-酮和二吡啶并[1,2-a:2',3'- d ]来自3-溴-N-(吡啶-2-基)吡啶-2-胺的嘧啶-5-酮,产率高达84%。也可以在不分离化合物1和另外的钯催化剂的情况下实现环羰基化。