作者:Aubert Ribaucourt、David M. Hodgson
DOI:10.1021/acs.orglett.6b02120
日期:2016.9.2
The sodium salts E-15 and Z-15 of the originally proposed dihydropyran acid structure of aruncin B (1) were prepared through ring-closing alkene metathesis (RCM) and ethoxyselenation–selenoxide elimination, but acid sensitivity of these salts, together with inconsistencies in the spectral data, suggested a significant structural misassignment. A β-iodo Morita–Baylis–Hillman reaction to give Z-iodo
通过闭环烯烃复分解(RCM)和乙氧基硒化-硒氧化物消除,制备了阿鲁霉素B(1)最初提出的二氢吡喃酸结构的钠盐E - 15和Z - 15,但是这些盐的酸敏感性以及不一致之处在光谱数据中,表明存在重大的结构错误分配。甲β碘森田-的Baylis-Hillman反应,得到ž碘酯24,随后的Sonogashira交叉偶联-5-外-挖内酯化,提供简洁访问ž -γ-alkylidenebutenolide 18,该数据具有与最初报道的阿鲁霉素B相对应的数据。