Steroids p. 113 - 122 (1989)
Update date:2022-08-02
Topics:
Tal, Daniel M.
The synthesis in improved yields of one 6,7-epoxide and three 6,7-dihydroxycanrenone derivatives is described.Canrenone was the starting material for all derivatives and was obtained by acid-catalyzed lactonization of potassium canrenoate.The epoxidation of canrenone to 6α,7α-epoxycanrenone by m-chloroperbenzoic acid was improved by addition of a free radical inhibitor.This epoxide was efficiently cleaved to 6β,7α-dihydroxy-6,7-dihydrocanrenone by perchloric acid in a dioxane-water mixture; 6β,7β- and 6α,7α-dihydroxy-6,7-dihydrocanrenone were obtained by OsO4 oxidation of canrenone in ether-pyridine and subsequent reduction of the osmates by hydrogen sulfide.The stereochemistry of the products obtained from the reaction of osmium tetroxide with the 6,7-double bond of steroidal 4,6-dien-3-ones has been a controversial issue for some time.A detailed proton-NMR study of the three diol derivatives unequivocally confirmed the proposed stereochemical structure.
View Morewebsite:http://www.hanwayschem.com
Contact:+86-18502787239(whatsapp)-
Address:18-1-802, Green Garden, Jianghan District, Wuhan 430023, China
hangzhou verychem science and technology co.ltd
website:http://www.verypharm.com
Contact:+86-571-88162785; 88162786
Address:F1502, 753 Shenhua road, Hangzhou, China
jintan yufan Medicine Raw materials Co.,Ltd.(expird)
Contact:86-519-82808282
Address:6th,Jincheng Huangzhuang
Shanghai better-in Medical Technology Co.,LTD.
Contact:+86-21-38921049
Address:Lane 720 zhangjianggaoke cailun road, Pudong, Shanghai, room 513
Daqing E-shine Chemical Co.,LTD
Contact:0086-024-31285112
Address:Hongweiyuan area, Ranghulu district
Doi:10.1016/j.tet.2006.08.084
(2006)Doi:10.1021/ja01588a027
(1956)Doi:10.1111/j.1747-0285.2011.01102.x
(2011)Doi:10.1016/j.tetlet.2008.12.056
(2009)Doi:10.1021/ic802396g
(2009)Doi:10.1107/S0108270198015893
(1999)
