Chemical Research in Chinese Universities ›› 1999, Vol. 15 ›› Issue (1): 23-28.

• Articles • Previous Articles     Next Articles

Synthesizing β-Chiral Carbon Alkanoic Acids and Alcohols via (-)-Bornane-10,2-crotonoylsultam

HUANG Jin-xia, LI Yan, MA Xing-quan, ZHOU Zhong-qiang   

  1. Department of Chemistry, Hubei University, Wuhan, 430062
  • Received:1998-04-20 Online:1999-01-24 Published:2011-08-17
  • Supported by:

    Supported by the National Natural Science Foundation of China.

Abstract: (+)-Camphor derived N-crotonoylsultam 2, readily available from chiral auxiliary bornane-10,2-sultam and crotonoyl chloride, reacted with selected Grignard reagent 3(R= n-butyl, n-pentyl, n-hexyl, n-heptyl) under the control of CuI or not being at low temperatures, giving diasteroisomers 4, 5 respectively. After nondestructive cleavage both enantiomers of the acid and alcohol were obtained in high e. e.%. The d. e.% of 4,5 was determined by HPLC, and the assignment of these values was discussed by analyzing 1H NMR(500 MHz).

Key words: Bornanesultam, N-Crotonoly sultam, Michael addition, Synthesis