Regioselective Opening of Chalcone Epoxides with Nitrogen Heterocycles Using Indium(III) Chloride as an Efficient Catalyst
摘要:
Indium(III) chloride catalyzes regioselective ring opening of chalcone epoxides with nitrogen heterocycles such as indole, 2-methyl indole, and pyrrole under mild conditions at room temperature to afford 1,3-diaryl-2-hydroxy-3-(1H-3-indolyl/2-pyrrolyl)propan-1-ones in good yields (6088%) within 2050min. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.
[4 + 2] Heterocyclization for Efficient Formation of Substituted Quinoxalines through Carbon-Oxygen Bonds Cleavage
作者:Man-Su Tu、Hai-Wei Xu、Wei Fan、Bo Jiang、Shu-Jiang Tu
DOI:10.1002/jhet.2128
日期:2015.5
A new domino strategy for efficient synthesis of highlyfunctionalized quinoxaline derivatives via [4 + 2] heterocyclization involving ring‐opening of oxirane process has been developed. The reactionpromoted by Cs2CO3 was easy to perform in a simple operation from common and inexpensive starting materials. The bisfunctionalization of quinoxaline framework including C2 benzylation and C3 arylation
已开发出一种新的多米诺骨牌策略,可通过[4 + 2]杂环化(包括环氧乙烷工艺的开环)有效合成高度官能化的喹喔啉衍生物。由Cs 2 CO 3促进的反应易于由普通且廉价的起始原料以简单的操作进行。喹喔啉骨架的双功能化(包括C2苄基化和C3芳基化)很容易以多米诺骨牌的方式实现,涉及裂解1,3-二芳基-2,3-环氧丙烷-1-酮的三个C-O键。