作者:Kolbot By、Patrick A Kelly、Mark J Kurth、Marilyn M Olmstead、Michael H Nantz
DOI:10.1016/s0040-4020(00)01117-0
日期:2001.2
to epoxy allylic alcohol 4 using an eight-step sequence that features a stereoselective methyl Grignard addition to an iodo-hexenulose. Epoxide formation via intramolecular iodide displacement occurs subsequent to an unusual hemiacetal reduction protocol involving LiBH4 in n-octanol. Alcohol 4 and the corresponding aldehyde (Z)-14 are potential C(4)–C(9) templates for eleutheside syntheses.
使用八步序列将d-葡糖醛转化为环氧烯丙醇4,该序列的特征是向碘己糖中添加立体选择性甲基格利雅(Grignard)。通过分子内碘化物置换形成环氧化合物是在涉及正辛醇中的LiBH 4的异常半缩醛还原方案之后发生的。酒精4和相应的醛(Z)-14是潜在的C(4)–C(9)模板,用于合成叶黄素。