2-methylcyclopent-2-enone to generate enolates, which upon reaction with 4-chlorobut-3-en-2-one and subsequent reduction have been converted into the corresponding enantiomers of hydrindenones suitable for conversion into vitamin D analogues and their enantiomers.
已经制备了(E)-丁-2-烯基-
叔丁基苯基膦氧化物的单独的对映异构体,并且每个
锂化的碳负离子与2-甲基环戊-2-烯酮进行完全立体选择性的共轭加成反应生成烯醇盐,与4反应-
氯丁-3-en-2-one及其随后的还原反应已被转化为适合于转化为
维生素D类似物及其对映异构体的
茚并酮的相应对映异构体。