57084-14-7Relevant articles and documents
Enzymatic esterification of (-)-menthol with fatty acids in solvent by a commercial lipase from Candida rugosa
Babali, Banu,Aksoy, H. Ayse,Tueter, Melek,Ustun, Guldem
, p. 53 - 56 (2001)
Esterification of (-)-menthol with fatty acids in isooctane was successfully catalyzed using a commercial lipase, Lipase AY 'Amano' 30 from Candida rugosa in original powder form. The esterification reactions were performed to elucidate the effects of temperature, enzyme load, molar ratio of (-)-menthol/fatty acid, and fatty acid type, keeping the (-)-menthol concentration at 200 mM. At the optimal conditions for (-)-menthol esterification, determined at a (-)-menthol/lauric acid molar ratio of 1:1 and 35°C [1.5 g enzyme/g (-)-menthol, 0.1 g molecular sieves], the molar conversion of (-)-menthol after 48 h reached 93%. After 24 h, the lowest and the highest molar conversions of fatty acids at 2:1 molar ratio were obtained with myristic acid (71%) and margaric acid (98%), respectively. After 48 h, the molar conversions of lauric acid at molar ratios 2:1, 1:1, and 1:2 were 98, 93, and 49%, respectively.
Heterobimetallic dinuclear lanthanide alkoxide complexes as acid-base difunctional catalysts for transesterification
Zeng, Ruijie,Sheng, Hongting,Zhang, Yongcang,Feng, Yan,Chen, Zhi,Wang, Junfeng,Chen, Man,Zhu, Manzhou,Guo, Qingxiang
, p. 9246 - 9252 (2014/12/11)
A practical lanthanide(III)-catalyzed transesterification of carboxylic esters, weakly reactive carbonates, and much less-reactive ethyl silicate with primary and secondary alcohols was developed. Heterobimetallic dinuclear lanthanide alkoxide complexes [Ln2Na8{(OCH2CH2NMe2)}12(OH)2] (Ln = Nd (I), Sm (II), and Yb (III)) were used as highly active catalysts for this reaction. The mild reaction conditions enabled the transesterification of various substrates to proceed in good to high yield. Efficient activation of transesterification may be endowed by the above complexes as cooperative acid-base difunctional catalysts, which is proposed to be responsible for the higher reactivity in comparison with simple acid/base catalysts.
Enzymatic esterification of (-)-menthol with lauric acid in isooctane by sorbitan monostearate-coated lipase from Candida rugosa
Babali,Aksoy,Tuter,Ustun
, p. 173 - 175 (2007/10/03)
Esterification of (-)-menthol and (±)-menthol with lauric acid in isooctane was successfully catalyzed by a commercial nonionic surfactant (sorbitan monostearate)-coated lipase from Candida rugosa (Lipase AY "Amano" 30) at the molar ratio of 1:1 andat 35°