Stereoselective and Enantioselective Syntheses of the Four Stereoisomers of Muscol from (3RS)-Muscone
作者:Yoshifumi Yuasa、Haruhiko Fukaya、Yoko Yuasa
DOI:10.1002/hlca.200790101
日期:2007.5
Two trans stereoisomers of 3-methylcyclopentadecanol (=muscol), (1R,3R)-2 and (1S,3S)-2, were efficiently synthesized from (3RS)-3-methylcyclopentadecanone (=muscone; (3RS)-1) by a highly stereoselective reduction (Scheme). L-Selectride® (=lithium tri(sec-butyl)borohydride) was used, followed by the enantiomer resolution by lipase QLG (Alcaligenes sp.). The cis stereoisomers of muscol, (1S,3R)-2 and
从(3 RS)-3-甲基环戊烯酮(=麝香酮)有效合成了3-甲基环戊烯醇(= muscol)的两个反式立体异构体(1 R,3 R)-2和(1 S,3 S)-2。RS)-1)通过高度立体选择性还原(Scheme)。三仲丁基硼氢化锂®(=锂三(仲丁基丁基)硼氢化)用于,然后通过脂肪酶QLG的对映体拆分(产碱杆菌属)。麝香的顺式立体异构体,(1 S,3 R)-2和(1 R,3 S)-2是分别通过(1 R,3 R)-2和(1 S,3 S)-2的Mitsunobu反演获得的(方案)。(1 R,3 R)-2的绝对构型是通过对其3-硝基邻苯二甲酸单酯2-[((1 R,3 R)-3-甲基环十五烷基氢苯-1]进行X射线晶体结构分析确定的2-二羧酸盐((1 R,3 R)-3b),以及将(1 R,3 R)-2-氧化为(3 R)-muscone。