Synthesis of the EF-ring segment of ciguatoxin CTX1B based on novel regioselective reduction of unsaturated cyanohydrins and ring-closing olefin metathesis
作者:Atsushi Takemura、Kenshu Fujiwara、Ken Shimawaki、Akio Murai、Hidetoshi Kawai、Takanori Suzuki
DOI:10.1016/j.tet.2005.05.073
日期:2005.8
convergent total synthesis of ciguatoxin CTX1B, its EF-ring segment has been synthesized. During the synthesis, a novel method for the construction of branched ethers, based on regioselective reduction of γ-alkoxy β,γ-unsaturated α-silyloxy nitriles with borontrifluoride etherate and trialkyl silane or tributyltin hydride, has been developed. Combination use of the method and ring-closing olefin metathesis
针对收敛的雪茄毒素CTX1B的合成,已经合成了其EF环段。在合成过程中,基于三氟化硼醚化物和三烷基硅烷或氢化三丁基锡,开发了一种基于区域选择性还原γ-烷氧基β,γ-不饱和α-甲硅烷氧基腈的支化醚的新方法。该方法与闭环烯烃复分解的结合使用成功地提供了中型环状醚。还已经开发出将乙烯基环氧化物有效地选择性还原成高烯丙基醇的方法。