The regiospecific synthesis of angularly-fused xanthones via the benzannulation of 1,2-adducts derived from 3-(o-anisoyl)-4-substituted cyclobutenediones and their dithianyl derivatives
作者:Lijun Sun、Lanny S. Liebeskind
DOI:10.1016/s0040-4039(97)00720-x
日期:1997.5
Described in this paper is a new synthetic approach to angularly-fused and simpler substituted xanthones that is based upon the benzannulation of 2-(o-anisoyl)-4-heteroaryl-2-cyclobutenones and 2-(2-(o-anisyl)-1,3-dithian-2-yl)-4-alkenyl-2-cyclobutenones followed by facile intramolecular loss of methanol and cyclization to the xanthone.
本文介绍了一种新的合成方法,该方法基于2-(o-异戊基)-4-杂芳基-2-环丁烯酮和2-(2-(o-茴香基) -1,3-二噻吩-2-基)-4-烯基-2-环丁烯酮,然后容易发生分子内甲醇损失和环化成to吨酮。