Enantioselective Acetylation of an .ALPHA.-Hydroxy Ester by Using Ether-Linked Lipid-Lipase Aggregates in Organic Solvents.
作者:Hiroyuki AKITA、Isao UMEZAWA、Djadjat TISNADJAJA、Hiroko MATSUKURA、Takeshi OISHI
DOI:10.1248/cpb.41.16
日期:——
Phospholipids of a new type having ω-cyclohexyltridecyl groups were synthesized in order to investigate the influence of the structure of lipophilic part of phospholipids upon the enzymatic reaction. Enantioselective acetylation of an α-hydroxy ester was carried out in the presence of lipid-lipase aggregates bearing O-ω-cyclohexyltridecyl and O-hexadecyl groups. The chemical yield of α-acetoxy ester was improved by using lipid-lipase aggregates compared to the case of enzymatic reaction using native lipase OF-360 from Candida cylindracea. It was found that the influence of the ω-cyclohexyltridecyl group on the chemical and optical yields of α-acetoxy ester was essentially the same as that to the hexadecyl group.
为了研究磷脂亲脂部分的结构对酶反应的影响,我们合成了具有ω-环己基十三烷基的新型磷脂。在含有 O-ω-环己基十三烷基和 O-十六烷基的脂质脂肪酶聚集体存在下,对 α-羟基酯进行了对映体选择性乙酰化。与使用来自圆柱形念珠菌的原生脂肪酶 OF-360 进行酶反应的情况相比,使用脂质脂肪酶聚集体提高了 α-乙酰氧基酯的化学产率。研究发现,ω-环己基十三烷基对 α-乙酰氧基酯的化学产率和光学产率的影响与对十六烷基的影响基本相同。