Synthesis of novel electron-deficient chromone-fused dienes via phosphine catalyzed [4+2] annulation

被引：11
|
作者：
Waldmann, Herbert [1 ,2 ]
Bruss, Hanna [1 ,2 ]
Dueckert, Heiko [1 ,2 ]
Kumar, Kamal [1 ]
机构：
[1] Max Planck Inst Mol Physiol, D-44227 Dortmund, Germany
[2] Univ Dortmund, Fachbereich Chem, D-44221 Dortmund, Germany
来源：
TETRAHEDRON LETTERS | 2011年 / 52卷 / 17期
关键词：
Benzopyrones; Lewis base catalysis; Rearrangements; Dienes; ANTHOCYANINS; ISOFLAVONOIDS; EFFICIENT;
D O I：
10.1016/j.tetlet.2011.01.151
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
alpha-Chromonyl ketoesters undergo phosphine catalyzed [4+2]-annulation reactions with acetylene carboxylates to yield tricyclic benzopyrones in good yields. Under mild acidic conditions, the tricyclic benzopyrones rearrange to provide highly substituted and electron-poor chromone-fused dienes in good yields. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2265 / 2267
页数：3
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