An easy preparation of opticallyactive 1,2-diol monotosylate derivatives by enzymatic hydrolysis is disclosed. Lipase PS ( BURKHOLDERIA CEPACIA) catalyzes the hydrolysis of racemic 2-acetoxyhexyl tosylate with excellent enantioselectivity to afford the corresponding opticallyactive compounds. In this reaction, a unique temperature effect is observed. After optimizing the reaction conditions, this
Chen, Ching-Shih; Liu, Yeuk-Chuen; Marsella, Michael, Journal of the Chemical Society. Perkin transactions I, 1990, # 9, p. 2559 - 2561
作者:Chen, Ching-Shih、Liu, Yeuk-Chuen、Marsella, Michael
DOI:——
日期:——
Amine assisted enzymatic esterification of 1,2-diol monotosylates
作者:Neil W. Boaz、Rebecca L. Zimmerman
DOI:10.1016/s0957-4166(00)86160-1
日期:1994.1
The enzymatic esterification of 1,2-diol monotosylates in organic solvent under standard conditions often fails to achieve the desired 50% conversion due to enzyme inactivation by acidic contaminants. The inclusion of an amine affords rapid conversion to 50% and provides enhanced enantioselectivity.
CHEN, CHING-SHIH;LIU, YEUK-CHUEN, TETRAHEDRON LETT., 30,(1989) N1, C. 7165-7168
作者:CHEN, CHING-SHIH、LIU, YEUK-CHUEN
DOI:——
日期:——
CHEN, CHING-SHIH;LIU, YEUK-CHUEN;MARSELLA, MICHAEL, J. CHEM. SOC. PERKIN TRANS PT 1,(1990) N, C. 2559-2561
作者:CHEN, CHING-SHIH、LIU, YEUK-CHUEN、MARSELLA, MICHAEL