Chemo-enzymatic Synthesis of 6?-O-(3-Arylprop-2-enoyl) Derivatives of the Flavonol Glucoside Isoquercitrin
作者:Bruno Danieli、Andrea Bertario、Giacomo Carrea、Barbara Redigolo、Francesco Secundo、Sergio Riva
DOI:10.1002/hlca.19930760823
日期:1993.12.15
directly introduce these acyl moieties by an enzyme-catalyzed reaction of 2a with the corresponding activated esters. This new approach was based on the regioselective introduction of a methyl malonate residue at the CH2OH of the sugar moiety by catalysis with the protease subtilisin ( 22a). The mixed diester 22a was then subjected to chemoselective hydrolysis of the methoxycarbonyl function by another
探索了一种化学酶促方法研究黄酮醇苷异槲皮苷(2a)的某些6″ -O-(3-芳基丙-2-烯酰基)衍生物,以克服无法通过2a的酶催化反应直接引入这些酰基部分的问题与相应的活化酯。该新方法基于通过用蛋白酶枯草杆菌蛋白酶(22a)催化在糖部分的CH 2 OH区域选择性引入丙二酸甲酯残基。然后使混合的二酯22a通过另一种酶,生物碱酯酶(23)进行甲氧基羰基官能团的化学选择性水解。最后,丙二酸酯23使它在Knoevenagel型缩合反应中与苯甲醛,4-羟基苯甲醛或4-羟基-3-甲氧基苯甲醛反应,得到目标6''- O-(3-芳基丙-2-烯酰基)异槲皮苷2b–d。