Different bio/Lewis acid-catalyzed stereoselective aldol reactions in various mediums
作者:Tülay Yıldız、Hasniye Yaşa、Belma Hasdemir、Ayşe S. Yusufoğlu
DOI:10.1007/s00706-017-1967-z
日期:2017.8
Brønsted acids were used for asymmetric aldol reactions of aromatic, heteroaromatic, cyclic, and acyclic six ketones and eleven aldehydes. Optimum reaction conditions were determined by changing temperature and enzyme, ketone, aldehyde, solvent, cofactors types, amounts, and ratios. PPL (porcine pancreatic lipase) of animal and AL-AN (amano lipase A from Aspergillus niger) of fungal origins were the
摘要在这项工作中,八种不同的粗制生物催化剂与六种路易斯酸和三种布朗斯台德酸一起用于芳族,杂芳族,环状和无环六种酮和十一种醛的不对称羟醛反应。最佳反应条件是通过改变温度和酶,酮,醛,溶剂,辅因子的类型,数量和比例来确定的。动物的PPL(猪胰脂肪酶)和真菌来源的AL-AN(黑曲霉的天基脂肪酶A )是最好的,并且相互比较。CoCl 2是最好的辅因子,与没有辅因子相比,它能更好地催化酶促醛缩反应。CoCl 2以前未用于酶促醛醇缩合反应。本研究中的方法使用粗制生物催化剂(PPL或AL-AN)和CoCl乙腈-水中的2被发现是不对称醛醇缩合反应的常规有用的生物催化方法,并且具有比文献中更好的ee值。 图形概要