Belkacemi, Fatima Zohra; Merabet-Khelassi, Mounia; Aribi-Zouioueche, Louisa; Riant, Olivier published the article 《Production of L-menthyl acetate through kinetic resolution by Candida cylindracea lipase: effects of alkaloids as additives》. Keywords: lipase kinetic resolution menthyl acetate alkaloid.They researched the compound: 4-(((1R,2S,5R)-2-Isopropyl-5-methylcyclohexyl)oxy)-4-oxobutanoic acid( cas:77341-67-4 ).Safety of 4-(((1R,2S,5R)-2-Isopropyl-5-methylcyclohexyl)oxy)-4-oxobutanoic acid. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:77341-67-4) here.
Abstract: Enzymic transesterification of dL-menthol with vinyl acetate in tert-Bu Me ether (TBME) catalyzed by Candida cylindracea lipase (CCL) was carried out in the presence of cinchona alkaloid as additive. The effects of various reaction parameters, such as lipase nature and loading, acylating agent, mol. sieves, solvents and various additives, on the reactivity as well as on the enantioselectivity were investigated. A significant improvement of CCL reactivity has been recorded after using cinchona alkaloid as additive in TBME. A high enantiomeric ratio (E = 80) was achieved when 30 mol% of quinidine was added, and L-(-)-menthyl acetate was obtained with 93% optical purity and 49% conversion. This process was easily applied to gram-scale quantities, using com. inexpensive lipase, providing high yield optically active menthol under mild exptl. conditions.
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Reference:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem