Origin of Stereocontrol in the Construction of the 12-Oxatricyclo[6.3.1.0<sup>2,7</sup>]dodecane Ring System by Prins−Pinacol Reactions
作者:Larry E. Overman、Paul S. Tanis
DOI:10.1021/jo9024144
日期:2010.1.15
substituents are formed stereospecifically by Prins−pinacol cyclizations of unsaturated α-dithianyl acetals 14a−e or 15a−e. These results show that the topography (boat or chair) of the Prins cyclization of the sulfur-stabilized oxocarbenium ions generated from acetals 14a−e or 15a−e is controlled by the stereoelectronic influence of the allylic substituents, with steric effects playing a minor role.
Novel spiro-benzo[c]chromene derivatives useful as modulators of the estrogen receptors
申请人:Zhang Xuqing
公开号:US20060020018A1
公开(公告)日:2006-01-26
The present invention is directed to novel spiro-benzo[C]chromene derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders mediated by one or more estrogen receptors. The compounds of the invention are useful in the treatment of disorders associated with the depletion of estrogen such as hot flashes, vaginal dryness, osteopenia and osteoporosis; hormone sensitive cancers and hyperplasia of the breast, endometrium, cervix and prostate; endometriosis, uterine fibroids, osteoarthritis and as contraceptive agents, alone or in combination with a progestogen or progestogen antagonist.
Novel Spiro-benzo[c]chromene derivatives useful as modulators of the estrogen receptors
申请人:Zhang Xuqing
公开号:US20090069362A1
公开(公告)日:2009-03-12
The present invention is directed to novel spiro-benzo[C]chromene derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders mediated by one or more estrogen receptors. The compounds of the invention are useful in the treatment of disorders associated with the depletion of estrogen such as hot flashes, vaginal dryness, osteopenia and osteoporosis; hormone sensitive cancers and hyperplasia of the breast, endometrium, cervix and prostate; endometriosis, uterine fibroids, osteoarthritis and as contraceptive agents, alone or in combination with a progestogen or progestogen antagonist.