Dynamic kinetic resolution in the baker's yeast mediated reduction of 2-Benzenesulfonylcycloalkanones
摘要:
2-Benzenesulfonylcyclopentanone 1 and -cyclohexanone 2 undergo efficient dynamic kinetic resolution on treatment with baker's yeast, under a range of conditions including in organic solvents, to form the corresponding cis-2-benzenesulfonylcycloalkanols 5 and 6 in excellent enantiopurity. Reduction of larger ring derivatives is much less efficient. (C) 1999 Elsevier Science Ltd. All rights reserved.
The dynamic kinetic resolution of β-keto sulfones was achieved via asymmetric transfer hydrogenation using (S,S)-RuCl[N-(tosyl)-1,2-diphenylethylenediamine](p-cymene) in the presence of formic acid and triethylamine afforded the desired products in good yield with up to >99 : 1 dr and high ee up to >99%.
Dynamic kinetic resolution in the baker's yeast mediated reduction of 2-Benzenesulfonylcycloalkanones
作者:Anita R. Maguire、Noreen O'Riordan
DOI:10.1016/s0040-4039(99)01947-4
日期:1999.12
2-Benzenesulfonylcyclopentanone 1 and -cyclohexanone 2 undergo efficient dynamic kinetic resolution on treatment with baker's yeast, under a range of conditions including in organic solvents, to form the corresponding cis-2-benzenesulfonylcycloalkanols 5 and 6 in excellent enantiopurity. Reduction of larger ring derivatives is much less efficient. (C) 1999 Elsevier Science Ltd. All rights reserved.