Kinetic resolution of vinyl carbonates through a lipase-mediated synthesis of their carbonate and carbamate derivatives.
摘要:
Lipase from Candida antarctica was used in the synthesis of different chiral carbonates and carbamates through the enzymic resolution of the starting racemic vinyl carbonates. A striking feature was the changeover of the enantioselectivity with regard to the one showed when vinyl carbonates were used in the resolution of alcohols and amines, thus the S enantiomer of the vinyl carbonate was resolved whereas the same enzyme was selective towards R ones when resolving alcohols and amines. In this way, compounds obtained beforehand as R carbonates were now achieved as S ones with better e.e.'s and shorter reaction times.
Kinetic resolution of vinyl carbonates through a lipase-mediated synthesis of their carbonate and carbamate derivatives.
摘要:
Lipase from Candida antarctica was used in the synthesis of different chiral carbonates and carbamates through the enzymic resolution of the starting racemic vinyl carbonates. A striking feature was the changeover of the enantioselectivity with regard to the one showed when vinyl carbonates were used in the resolution of alcohols and amines, thus the S enantiomer of the vinyl carbonate was resolved whereas the same enzyme was selective towards R ones when resolving alcohols and amines. In this way, compounds obtained beforehand as R carbonates were now achieved as S ones with better e.e.'s and shorter reaction times.
Double enantioselective enzymic synthesis of carbonates and urethanes
作者:Marcos Pozo、Vicente Gotor
DOI:10.1016/0957-4166(95)00369-z
日期:1995.11
Double enantioselective lipase-catalyzed alkoxycarbonylation of racemic alcohols and amines with racemic vinyl carbonates to yield carbonates and carbamates with two stereogenic centers was carried out using Candida antarctica lipase.