Synthesis of natural pulvinic acids based on a ‘[3+2] cyclization–Suzuki cross-coupling’ strategy
作者:Zafar Ahmed、Peter Langer
DOI:10.1016/j.tet.2004.12.048
日期:2005.2
A number of pulvinic acid natural products were prepared based on Suzuki cross coupling reactions of α-hydroxy-γ-alkylidenebutenolides which are readily available by cyclization of 1,3-bis-silyl enol ethers with oxalyl chloride. The formal total synthesis of pulvinic acid, atromentic acid, gomphidic acid and of 4-hydroxypulvinic acid, 4′-hydroxypulvinic acid and iso-gomphidic acid are reported. In
基于α-羟基-γ-亚烷基丁烯内酯的Suzuki交叉偶联反应,制备了许多pulvinic acid天然产物,其可通过将1,3-双-甲硅烷基烯醇醚与草酰氯环化而容易地获得。据报道,正式合成了戊二酸,阿托品酸,gomphidic酸和4-羟基pulvinic酸,4'-羟基pulvinic酸和异-gomphidic酸。此外,完成了樟脑酸,异羟肟酸和杂色酸的全部合成。