Journal of the Chemical Society. Perkin transactions I p. 1819 - 1822 (1993)
Update date:2022-08-03
Topics:
Hazra, Braja G.
Pore, Vandana S.
Joshi, Padmakar L.
A streoselective synthesis of 6-oxo-23,24-dinor-5α-cholan-2α,3α,22-triyl triacetate 9 was achieved in 44percent overall yield in nine steps starting from 3β-hydroxyandrost-5-en-17-one 8.The important features of this synthesis are the modified Wittig reaction on the 17-oxo steroid 8 and the stereospecific generation of the chiral centre at C-20 by a resin-catalysed ene reaction on (Z)-3β, p-tolylsulfonyloxypregna-5,17(20)-diene 11.
View MoreGoldwills Pharmaceuticals Co., Ltd.
Contact:0916-2237889 13991621155
Address:North Suburb of Hanzhong city, Shaanxi Province
Lianyungang Yunbo Chemical Co.,Ltd.
Contact:518-81066110
Address:B907,Dongsheng"Mingdu Square,21-2 East Chaoyang Road,Xinpu,(sale department)
Rizhao Lanxing Chemical Indusrial Co.,Ltd
Contact:86-633-2616708
Address:NO.15 West road Shenglan, Lanshan district, Rizhao City
NIGNXIA XINDACHANG TECHNOLOGY CO.,LTD
website:https://xdcchemical.com/
Contact:86-311-85758226
Address:North Industry Area, Wuji
Shanghai Forever Biotech Co., Ltd.
Contact:+86-21-69734790
Address:Room 5017/5019、5022、5024 of Technology Innovation Centre, No.1155, Gongyuan East Rd, QingPu District, Shanghai China.
Doi:10.1016/j.bmc.2015.07.035
(2015)Doi:10.1002/hlca.19330160177
(1933)Doi:10.1071/CH9670723
(1967)Doi:10.1021/jo00070a025
(1993)Doi:10.1021/jo00100a047
(1994)Doi:10.1016/S0040-4020(01)89404-7
(1994)