AbstractWax esters from fatty alcohols and uncommon fatty acids were synthesized in yields up to 90% when commercially available microbial lipases fromRhizomucor miehei (Lipozyme™) andCandida antarctica (SP 435) were used with limited water content in nonpolar solvents under mild conditions. The corresponding fatty acids were prepared by chemical conversion of naturally occurring resources (agricultural surpluses). Also, when phenylboronic acid was added as solubilizing agent in a nonpolar solvent, the direct enzymatic monoacylation of glycerol with uncommon fatty acids was successful. The measurement of π/A‐isotherms by means of a Langmuir film balance indicated medium film pressures, medium or large molecular areas, and interesting phase behavior. The monolayer of a wax ester at the air/water interface could be directly visualized by Brewster angle microscopy.
摘要 在温和条件下的非极性溶剂中,使用市售的微生物脂肪酶(Rhizomucor miehei (Lipozyme™) 和 Candida antarctica (SP 435))和有限的含水量,从脂肪醇和不常见的脂肪酸合成蜡酯,产率高达 90%。相应的脂肪酸是通过天然资源(农业剩余物)的化学转化制备的。此外,在非极性溶剂中加入苯硼酸作为增溶剂时,甘油与非常见脂肪酸的直接酶促单乙酰化也获得了成功。通过朗缪尔薄膜天平测量 π/A 等温线,结果表明薄膜压力适中,分子面积中等或较大,相行为有趣。空气/水界面上的蜡酯单层可通过布儒斯特角显微镜直接观察到。