Towards the selective acylation of secondary hydroxyl groups of carbohydrates using oxime esters in an enzyme-catalyzed process
作者:Rosalino Pulido、Vicente Gotor
DOI:10.1016/0008-6215(94)90005-1
日期:1994.1
alkyloxycarbonylation. A lipase from Pseudomonas cepacia catalyzed also the regioselective acylation of the primary hydroxyl group of 1 and 2 when 1,4-dioxane was used as solvent. Moreover, this lipase was a suitable biocatalyst for the acylation of the secondary HO-3 of 6- O (benzyloxy)carbonyl derivatives of 2-deoxy- d -hexoses. Subsequent deprotection of the primary hydroxyl group through catalytic hydrogenation
摘要使用南极假丝酵母的脂肪酶,以肟酯为肟基,对2-脱氧-d-阿拉伯-己基吡喃糖(1)和2-脱氧-d-lyxo-己基吡喃糖(2)基团的伯羟基进行区域选择性酰化和烷氧基羰基化。酰化剂。吡啶和1,4-二恶烷均用作酰化过程中的溶剂,但只有1,4-二恶烷对烷氧基羰基化有效。当将1,4-二恶烷用作溶剂时,来自洋葱假单胞菌的脂肪酶还催化1和2的伯羟基的区域选择性酰化。此外,该脂肪酶是用于2-脱氧-d-己糖的6-O(苄氧基)羰基衍生物的仲HO-3的酰化的合适的生物催化剂。随后通过催化氢化使伯羟基脱保护,容易得到1和2的3-O-酰基衍生物。还报道了通过上述脂肪酶对1,6-脱水-β-d-吡喃葡萄糖的区域选择性酰化和烷氧基羰基化的研究。