Candida antarctica lipase B-mediated regioselective acylation of dihydroxybenzenes in organic solvents
作者:Toshifumi Miyazawa、Manabu Hamada、Ryohei Morimoto、Yuki Maeda
DOI:10.1016/j.tet.2015.04.033
日期:2015.6
Candida antarctica lipase B proved to be a highly active biocatalyst for the direct acylation of phenolic hydroxy groups of substituted hydroquinones and resorcinols, which have rarely been reported so far. More importantly, the acylation reactions took place generally in a markedly regioselective manner: the hydroxy group remote from the substituent was preferentially acylated. In the case of substituted
南极假丝酵母脂肪酶B被证明是一种高活性生物催化剂,可直接酰化取代的对苯二酚和间苯二酚的酚羟基,到目前为止,鲜有报道。更重要的是,酰化反应通常以明显的区域选择性方式发生:远离取代基的羟基优先被酰化。在取代氢醌的情况下,选择性随取代基体积的增加而增加。有趣的是,在4-取代的间苯二酚的情况下,作为唯一产物获得了1- O-单酰化的衍生物。