Acid-Promoted Cascade Cyclization to Produce 2-(4′-Alkoxyaryl)-3,4-Fused Tricyclic Dihydrobenzopyrans via a Vinylidene <i>para-</i>
Quinone Methide Intermediate
作者:Dongil Choi、Naoki Shiga、Robert Franzén、Tetsuhiro Nemoto
DOI:10.1002/ejoc.201800013
日期:2018.4.23
We developed a novel method for synthesizing 2‐(4‐hydroxyaryl)‐3,4‐fused tricyclic dihydrobenzopyrans with 2,3‐syn and 3,4‐syn motifs based on the acid‐promoted cascade cyclization via vinylidene para‐quinone methide intermediates. The developed method provided new access to potent and selective ERβ agonists from a simple linear substrate in a single‐step reaction.
我们开发了一种新的方法,该方法基于通过亚乙烯基对甲基对苯二甲酰甲基中间体的酸促进级联环化反应,合成具有2,3- syn和3,4- syn基序的2-(4-羟基芳基)-3,4-稠合的三环二氢苯并吡喃。 。所开发的方法提供了从简单线性底物在一步反应中获得有效和选择性ERβ激动剂的新途径。