STUDY ON STEROSELECTIVE BOROHYDROGENATION OF 3,5-CYCLO-6-METHOXYL-PREGN-20(22)-ENE

Chinese Journal of Applied Chemistry ›› 1989, Vol. 0 ›› Issue (2): 60-62.

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STUDY ON STEROSELECTIVE BOROHYDROGENATION OF 3,5-CYCLO-6-METHOXYL-PREGN-20(22)-ENE

Liu Xingping¹, Liang Xiaotian²

1. Institute of Organic Chemistry, Lanzhou University;
2. Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing

Received:1988-05-13 Revised:1988-08-05 Published:1989-04-10 Online:1989-04-10

Abstract

Abstract: The stereoselective borohydrogenation of 3,5-cyclo-6-methoxyl-pregn-20(22) 5 by dicy-clohexylboronane to 20S-22-ol 1 was investigated.An appropriate ratio of sodium borohydrideto boron trifluoride used in this reaction was given, and the structure of 3 unexpected pro-ducts 6,7,8 obtained in this reaction was determined.

Key words: Stereoselective borohydrogenation, Dicyclohexylboronane, Sodium borohyd-ride, Boron trifluoride, Brassinolide

Liu Xingping, Liang Xiaotian. STUDY ON STEROSELECTIVE BOROHYDROGENATION OF 3,5-CYCLO-6-METHOXYL-PREGN-20(22)-ENE[J]. Chinese Journal of Applied Chemistry, 1989, 0(2): 60-62.

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[2]	Liu Qitao, Zhang Xiangdong, Jiang Xiangshun, Xue Bangming, Jiang Hui. A THERMOCHEMICAL STUDY ON THE ESTABLISHMENT OF SOLID MODEL OF LEWIS ACIDITY [J]. Chinese Journal of Applied Chemistry, 1993, 0(2): 78-80.
[3]	Liu Xingping. ON THE OXIDATION OF 3,5-CYCLO-24S-ETHYL-CHOLEST-22-EN-6-ONE BY I₂-KIO₃-AcOH-H₂ O SYSTEM [J]. Chinese Journal of Applied Chemistry, 1990, 0(2): 54-56.

STUDY ON STEROSELECTIVE BOROHYDROGENATION OF 3,5-CYCLO-6-METHOXYL-PREGN-20(22)-ENE

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