Preparation of the enantiomers of 19-epoxy docosahexaenoic acids and their 4-hydroxy derivatives
作者:Tadahiro Kato、Takayuki Ishimatu、Akiko Aikawa、Kohji Taniguchi、Takuma Kurahashi、Toshio Nakai
DOI:10.1016/s0957-4166(00)00015-x
日期:2000.3
By the action of NBS in aq. DME, dl-19-bromo-20-hydroxy-DHA methyl ester 5 was prepared, which was effectively resolved by lipase PS and vinyl acetate in the presence of a thiacrown ether to give 7 and 8, each being transformed into the corresponding epoxides, 1 and 2, respectively. The absolute configuration of 8 was established by the Kusumi–Moscher method. For the purpose of biological evaluation
由国家统计局在水溶液中的作用。制备DME dl -19-溴20-羟基-DHA甲酯5,将其通过脂肪酶PS和乙酸乙烯酯在噻咯烷醚的存在下有效拆分,得到7和8,分别转化为相应的环氧化物,分别为1和2。8的绝对构型是通过Kusumi–Moscher方法建立的。为了生物学评估的目的,两种环氧化物都被转化为γ-内酯3和它们的4-羟基衍生物4。