Preparation of Furo[3,2-<i>c</i>]coumarins from 3-Cinnamoyl-4-hydroxy-2<i>H</i>-chromen-2-ones and Acyl Chlorides: A Bu<sub>3</sub>P-Mediated C-Acylation/Cyclization Sequence
作者:Chia-Jui Lee、Cheng-Che Tsai、Shao-Hao Hong、Geng-Hua Chang、Mei-Chun Yang、Lennart Möhlmann、Wenwei Lin
DOI:10.1002/anie.201502789
日期:2015.7.13
3‐cinnamoyl‐4‐hydroxy‐2H‐chromen‐2‐ones though electrophilic addition of acyl chlorides towards the synthesis of highly functionalized furo[3,2‐c]coumarins bearing a phosphorus ylide moiety is described. These unprecedented cyclization reaction proceeds under mild reaction conditions within short reaction times (1 min to 1 h), and can be further applied in the synthesis of alkenyl‐substituted furo[3,2‐c]coumarins
Bu 3 P介导的3-肉桂酸酯-4-羟基-2-H-铬原子-2-酮的环化反应,通过亲电添加酰氯来合成高度功能化的带有磷叶立德部分的呋喃[3,2-c]香豆素描述。这些空前的环化反应在温和的反应条件下,在较短的反应时间(1分钟至1小时)内进行,并且可以通过在碱性条件下用羰基亲电试剂处理,进一步应用于烯基取代的呋喃[3,2-c]香豆素的合成。条件。