Use of enantio-, chemo- and regioselectivity of acylase I. Resolution of polycarboxylic acid esters
摘要:
Acylase I was used to catalyze the enantioselective butanolysis of trimethyl 2-[(carboxymethyl)oxy]succinate (E=30) and N-carboxymethylaspartate (E=9) exclusively at the most sterically hindered of the three ester group's (the position alpha to the asymmetric centre). Gram-scale resolution allowed the preparation of the less reactive trimethyl (S)-2-[(carboxymethyl)oxy]succinate (96% e.e.), that of the (R)-butyldimethyl regioisomer (78% e.e.) at 55% conversion and finally the preparation of the corresponding trisodium carboxylate by saponification. Acylase I was shown to transform (+/-)-methyl N-acetylmethionine and (+/-)-valine to the corresponding (S)-amino acids through ester hydrolysis-N-acetyl transfer sequence with absolute chemo- and enantioselectivity. Butanolysis of methyl N-acetylmethionine stopped in the formation of the butyl ester (E=12), the valine derivative being totally unreactive. (C) 2001 Elsevier Science Ltd. All rights reserved.
Use of enantio-, chemo- and regioselectivity of acylase I. Resolution of polycarboxylic acid esters
作者:Arto Liljeblad、Reijo Aksela、Liisa T. Kanerva
DOI:10.1016/s0957-4166(01)00362-7
日期:2001.8
Acylase I was used to catalyze the enantioselective butanolysis of trimethyl 2-[(carboxymethyl)oxy]succinate (E=30) and N-carboxymethylaspartate (E=9) exclusively at the most sterically hindered of the three ester group's (the position alpha to the asymmetric centre). Gram-scale resolution allowed the preparation of the less reactive trimethyl (S)-2-[(carboxymethyl)oxy]succinate (96% e.e.), that of the (R)-butyldimethyl regioisomer (78% e.e.) at 55% conversion and finally the preparation of the corresponding trisodium carboxylate by saponification. Acylase I was shown to transform (+/-)-methyl N-acetylmethionine and (+/-)-valine to the corresponding (S)-amino acids through ester hydrolysis-N-acetyl transfer sequence with absolute chemo- and enantioselectivity. Butanolysis of methyl N-acetylmethionine stopped in the formation of the butyl ester (E=12), the valine derivative being totally unreactive. (C) 2001 Elsevier Science Ltd. All rights reserved.
Vijverberg, C. A. M.; Peters, J. A.; Bovee, W. M. M. J., Recueil des Travaux Chimiques des Pays-Bas, 1983, vol. 102, # 5, p. 255 - 263
作者:Vijverberg, C. A. M.、Peters, J. A.、Bovee, W. M. M. J.、Vroon, H.、Kieboom, A. P. G.、Bekkum, H. van