Structure-activity relationships of estrogenic ligands: synthesis and evaluation of (17.alpha.,20E)- and (17.alpha.,20Z)-21-halo-19-norpregna-1,3,5(10),20-tetraene-3,17.beta.-diols
作者:Elio Napolitano、Rita Fiaschi、Robert N. Hanson
DOI:10.1021/jm00113a012
日期:1991.9
affinity (RBA) for the estrogen receptor with use of a rat uterine preparation. The results demonstrated a marked difference between the E and Z isomers and among the halogen employed. The Z isomers possessed significantly higher RBA values and the larger halogens (I, Br) were more effective than the smaller Cl substituent. These results modify the previous interpretations of estrogen-receptor binding for
HANSON, ROBERT N.;EL-WAKIL, HODA;MURPHY, FRANCIS;WILBUR, D. SCOTT, J. LABELL. COMPOUNDS AND RADIOPHARM., 27,(1989) N, C. 615-627
作者:HANSON, ROBERT N.、EL-WAKIL, HODA、MURPHY, FRANCIS、WILBUR, D. SCOTT
DOI:——
日期:——
Electrophilic destannylation: stereospecific introduction of electrophiles at the 21 position of (17.alpha.)-19-norpregna-1,3,5(10),20-tetraene-3,17.beta.-diols
作者:Robert N. Hanson、Hoda El-Wakil
DOI:10.1021/jo00392a036
日期:1987.8
US4725426A
申请人:——
公开号:US4725426A
公开(公告)日:1988-02-16
Estrogenic 17.alpha.-halogen-vinylestranes
申请人:Schering Aktiengesellschaft
公开号:US04725426A1
公开(公告)日:1988-02-16
17.alpha.-bromo-.alpha. and 17.alpha.-iodo-vinyl-estrane derivatives of general formula I ##STR1## wherein X is a bromine or iodine atom in Z or E position, R.sup.1 is hydrogen, hydroxy or acyloxy with up to 3 C atoms, R.sup.2 is hydrogen, alkyl with up to 3 C atoms and alkanoyl and aroyl with up to 7 C atoms, R.sup.3 is hydrogen or methyl, R.sup.4 is a hydrogen atom in the .alpha. or .beta. position, R.sup.5 is hydrogen, methyl or methoxy and R.sup.6 is hydrogen or methyl, are pharmacologically effective with a profile of action like ethinylestradiol and in the form of their radioactively labeled compounds are also valuable diagnostic media. The Z-isomers can be prepared by a new process by reaction of the corresponding 17.alpha.-ethinyl steroids with trialkyl (or phenyl) tin hydride with addition of a free radical former.