Functionalisations of estrone benzyl ether at the 11 and 12 positions
摘要:
The prior protection of estrone as estrone benzyl ether (EBE) facilitated the 9,11 dehydrogenation by DDQ, which is a key step for the 11 functionalisation. The oxidation of estrone benzyl ether by an excess of DDQ in dioxane containing a small amount of methanol allowed for an unusual 12 functionalisation with a methoxy group. (C) 2000 Elsevier Science Ltd. Ail rights reserved.
Synthesis of 11α- and 11β-diethylaminoethyl ethers of 17α-ethynylestradiol
作者:Cecil M. DiNunno、P. Narasimha Rao、Hyun K. Kim
DOI:10.1039/p19810002401
日期:——
The 11α- and 11β-diethylaminoethylethers of 17α-ethynylestradol have been prepared from the intermediate alcohols (7a) and (7b) by direct alkylation with 2-N,N-diethylaminoethyl bromide hydrobromide followed by hydrogenolysis, deacetalization, and reaction with lithium acetylide. The two 11-diethylaminoethyl ethers of 17α-ethynylestradiol showed no significant estrogenic, anti-estrogenic, or post-coital
Functionalisations of estrone benzyl ether at the 11 and 12 positions
作者:Elie Stéphan、Patrice Sery、Gérard Jaouen
DOI:10.1016/s0040-4039(00)00024-1
日期:2000.3
The prior protection of estrone as estrone benzyl ether (EBE) facilitated the 9,11 dehydrogenation by DDQ, which is a key step for the 11 functionalisation. The oxidation of estrone benzyl ether by an excess of DDQ in dioxane containing a small amount of methanol allowed for an unusual 12 functionalisation with a methoxy group. (C) 2000 Elsevier Science Ltd. Ail rights reserved.