Candida antarctica lipase A in the dynamic resolution of novel furylbenzotiazol-based cyanohydrin acetates
摘要:
A series of novel (R)-furylbenzotiazol-based cyanohydrin acetates were prepared in over 90% isolated yields from the corresponding furancarbaldehydes. The one-pot method combines a basic resin to produce hydrogen cyanide from acetone cyanohydrin, an equilibrium between the formation and decomposition of furylbenzotiazol-based cyanohydrins and the unique enantioselectivity of Candida antarctica lipase A, allowing the acylation of (R)-cyanohydrins in the presence of vinyl acetate in anhydrous acetonitrile. (C) 2003 Elsevier Science Ltd. All rights reserved.
Candida antarctica lipase A in the dynamic resolution of novel furylbenzotiazol-based cyanohydrin acetates
摘要:
A series of novel (R)-furylbenzotiazol-based cyanohydrin acetates were prepared in over 90% isolated yields from the corresponding furancarbaldehydes. The one-pot method combines a basic resin to produce hydrogen cyanide from acetone cyanohydrin, an equilibrium between the formation and decomposition of furylbenzotiazol-based cyanohydrins and the unique enantioselectivity of Candida antarctica lipase A, allowing the acylation of (R)-cyanohydrins in the presence of vinyl acetate in anhydrous acetonitrile. (C) 2003 Elsevier Science Ltd. All rights reserved.
CaL-B a highly selective biocatalyst for the kinetic resolution of furylbenzthiazole-2-yl-ethanols and acetates
作者:László Csaba Bencze、Csaba Paizs、Monica Ioana Toşa、Maria Trif、Florin Dan Irimie
DOI:10.1016/j.tetasy.2010.06.010
日期:2010.8
A highly stereoselective enzymatic kinetic resolution of novel various substituted racemic furylbenzthiazole-2-yl-ethanols and their acetates has been developed. Both processes, the enzymatic acylation of the racemic alcohols and the enzymatic methanolysis of racemic acetates yielded highly enantiomerically enriched (ee >98%) resolution product, when CaL-B was used as a biocatalyst in acetonitrile. The absolute configuration of the obtained (R)-(+)-1-(5-(4-chlorobenzo[d]thiazol-2-yl)furan-2-y1)ethanol was determined by a detailed H-1 NMR study of rac- and (+)-1-(5-(4-chlorobenzo[d]thiazol-2-yl)furan-2-yl)ethanol Mosher derivatives. (C) 2010 Elsevier Ltd. All rights reserved.
FISER-JAKIC, L.;JAKOPCIC, K., CROAT. CHEM. ACTA, 1981, 54, N 2, 245-248
Candida antarctica lipase A in the dynamic resolution of novel furylbenzotiazol-based cyanohydrin acetates
作者:Csaba Paizs、Monica Toşa、Cornelia Majdik、Petri Tähtinen、Florin Dan Irimie、Liisa T. Kanerva
DOI:10.1016/s0957-4166(03)00025-9
日期:2003.3
A series of novel (R)-furylbenzotiazol-based cyanohydrin acetates were prepared in over 90% isolated yields from the corresponding furancarbaldehydes. The one-pot method combines a basic resin to produce hydrogen cyanide from acetone cyanohydrin, an equilibrium between the formation and decomposition of furylbenzotiazol-based cyanohydrins and the unique enantioselectivity of Candida antarctica lipase A, allowing the acylation of (R)-cyanohydrins in the presence of vinyl acetate in anhydrous acetonitrile. (C) 2003 Elsevier Science Ltd. All rights reserved.