An Improved and Versatile Method for the Rapid Synthesis of Aryldihydrobenzofuran Systems by a Boron Tribromide-Mediated Cyclization Reaction
作者:Richard Detterbeck、Manfred Hesse
DOI:10.1002/hlca.200390036
日期:2003.2
Boron tribromide is presented as a highly reactive reagent that simultaneously allows the demethylation and fully diastereoselective cyclization of different precursor molecules, obtained by an aldol-type reaction, to a series of hydroxylated aryldihydrobenzofuran systems in racemic form. The latter are often found as key structures in natural compounds of different classes. Syntheses of educts, which
三溴化硼是一种高反应性试剂,可同时使通过醛醇型反应获得的不同前体分子脱甲基化和完全非对映选择性环化成一系列外消旋形式的羟基化芳基二氢苯并呋喃系统。后者经常被发现为不同类别天然化合物中的关键结构。还描述了主要利用通用理查甲酰化作用的离析物的合成。