developed. The method was based on Lewis-acid-promoted γ-position selective reduction of a γ-alkoxy β,γ-unsaturated α-silyloxy nitrile, prepared through a process including intermolecular hetero-Michael reaction of a 2-butynoate ester derivative with an alcohol. The method was efficiently applied to the synthesis of fused medium-ring ethers involving the EF-ring segment (2) of ciguatoxin (1).
开发了支链醚体系的合成方法。该方法基于
路易斯酸促进的γ-烷氧基β,γ-不饱和α-甲
硅烷氧基腈的γ位置选择性还原,该过程通过包括2-
丁酸酯衍
生物与醇的分子间杂-迈克尔反应的方法制备。该方法有效地用于合成涉及雪茄毒素(1)的EF环链段(2)的稠合中
环醚。