Total synthesis of cytotoxic metabolite ( ± )-desmethyldiaportinol from <i>Ampelomyces</i> sp.
作者:Aamer Saeed、Muhammad Qasim
DOI:10.1080/14786419.2013.866111
日期:2014.2.1
of 3,5-dimethoxyhomopthalic acid with 3,4-dibromobutanoyl chloride afforded the 3-(2,3-dibromopropyl)-6, 8-dimethoxyisocoumarin in 2–3 min as the pivotal step. The 3,4-dibromobutanoyl chloride was itself synthesised from 3-butenoic acid via bromination in carbon tetrachloride at room temperature to yield 3,4-dibromobutanoic acid followed by reaction with thionyl chloride. The replacement of bromo- by
从Ampelomyces sp。分离的(±)-desmethyldiaportinol的简明全合成。描述。3,5-二甲氧基高苯甲酸与3,4-二溴丁酰氯的微波辅助环缩合反应在2–3分钟内提供了3-(2,3-二溴丙基)-6,8-二甲氧基异香豆素作为关键步骤。3,4-二溴丁酰氯本身是由3-丁烯酸在室温下在四氯化碳中溴化合成的,得到3,4-二溴丁酸,然后与亚硫酰氯反应。在温和的条件下实现溴取代羟基取代,包括在丙酮和水的混合物中回流以提供(±)-3-(2,3-二羟丙基)-6,8-二甲氧基异香豆素,在完全脱甲基后,得到标题天然产物。