Stereoselective thio-Michael addition to chalcones in water catalyzed by bovine serum albumin
摘要:
A biomimetic, inexpensive, and simple method for the stereoselective thio-Michael addition of thiols to chalcones has been developed using bovine serum albumin (BSA) as a catalyst. Optically active products are obtained in high yield and with enantiomeric excesses of up to 70%. (C) 2011 Elsevier Ltd. All rights reserved.
Michael addition of thioacetic and thiobenzoic acids to activatedolefins was investigated in the presence of water under catalyst-free conditions. This process, in addition to being green, has an excellent yield. With simple filtration, high-quality products were obtained on a large scale. Competitive dithiane formation and ester cleavage were not observed. Also, excellent yield was obtained using