Contrasting steric effects of the ketones and aldehydes in the reactions of the diisopinocampheyl enolborinates of methyl ketones with aldehydes
作者:P.Veeraraghavan Ramachandran、Wei-chu Xu、Herbert C. Brown
DOI:10.1016/0040-4039(96)00969-0
日期:1996.7
representative series of aldehydes, both of differing steric requirements provides aldols whose enantiomeric purities depend on the steric requirements of both the ketones and the aldehydes. This study has shown that increasing the steric requirements of the R group in the ketones has a pernicious effect on the ee, while increasing the steric requirements of the R group in the aldehydes exerts a beneficial
Use of biological systems for the synthesis of chiral molecules. 5. Microbiological reduction of acyclic .beta.-diketones
作者:Annie Fauve、Henri Veschambre
DOI:10.1021/jo00257a004
日期:1988.10
Utilisation des methodes biologiques pour la preparation de synthons chiraux : I-reduction de β-dicetones acycliques par saccharomyces cerevisiae (levure de boulanger)