Practical semisynthesis of equilenin and its derivatives
作者:Tao Yue、Hong-Ping Li、Kai Ding
DOI:10.1016/j.tetlet.2016.09.062
日期:2016.10
are important intermediates in the synthesis of steroidal drugs. Until now, these estrogens were produced by extraction from pregnant mare’s urine due to the lack of efficient synthetic methods. Most reported semisyntheses of equilenin involve expensive raw materials or toxic reagents to suppress undesired epimerization at C/D ring juncture. Herein, we reported a practical synthesis of highly pure
Dispironaphthalenones and spironaphthalenones as novel dehydrogenation reagents
作者:Tirumalai R. Kasturi、Jitendra A. Sattigeri
DOI:10.1016/s0040-4020(01)88233-8
日期:1992.1
Dehydrogenation of a number of dihydroaromatic substrates has been carried out using either dispironaphthalenone 1 or spironaphthalenones 2 & 3 as dehydrogenating agents. The reaction is over in refluxing mesitylene in 1-2 hr and the yields of the aromatised products are fairly good (65-70%).
Synthesis and Study of Equilenin Derivatives and Modified Analogs
作者:E. A. Urusova、I. A. Gluzdikov、S. I. Selivanov、G. L. Starova、S. V. Nikolaev、A. G. Shavva
DOI:10.1023/b:rujo.0000036071.26335.eb
日期:2004.4
Modified equilenin analogs were synthesized with a view to examine the relation between the structure and biological properties of steroid estrogens. The H-1 and C-13 NMR signals of six estra-1,3,5,7,9-pentaenes were completely assigned using homo- and heteronuclear correlation NMR spectroscopy. The structure of equilenin methyl ester was determined by X-ray analysis. Among the synthesized steroids, compounds were found which exhibit hypocholesterinemic activity with no uterotropic and hypertriglyceridemic effects.