Synthesis and antimitotic activity of novel 2-methoxyestradiol analogs. Part III
摘要:
The syntheses and antimitotic activity of several novel analogs of 2-methoxyestradiol are described. Structural modifications include ring-D homologation, aromatization of the six-membered ring-D to a chrysine type molecule, and introduction of unsaturation in five-membered ring-D along with substitution of alkyl and ethynyl groups for the 17 beta-hydroxy function. of nine analogs synthesized, five have demonstrated superior antiproliferative activities compared to 2-methoxyestradiol. (C) 2007 Elsevier Inc. All rights reserved.
The acidic dehydration of 17alpha-ethynyl-17beta-hydroxysteroids (1-3) was investigated. On reaction with thionyl chloride, phosphorus oxychloride, and formic acid, the desired dehydration was accompanied by chlorination, Wagner-Meerwein rearrangement, and D-homoaromatic rearrangement. The structure of the product from the transformation of 17beta-hydroxypregn-20-yne derivative (3) on reaction with formic acid was misjudged. It was regarded as a pregn-16-en-20-yne (10) instead of the actually rearranged D-homoaromatic compound (11). As a consequence, physical data corresponding to this latter structure have been cited in the literature as those of pregn-16-en-20-yne derivative (10). This confusion prompted us to prepare compounds of both types (4, 9, 10, and 11), the characterization of which is here described.
Pindur, Ulf; Schall, Thomas, Liebigs Annalen der Chemie, 1993, # 10, p. 1099 - 1104
作者:Pindur, Ulf、Schall, Thomas
DOI:——
日期:——
Synthesis and antimitotic activity of novel 2-methoxyestradiol analogs. Part III
作者:Pemmaraju N. Rao、James W. Cessac、James W. Boyd、Arthur D. Hanson、Jamshed Shah
DOI:10.1016/j.steroids.2007.10.016
日期:2008.2
The syntheses and antimitotic activity of several novel analogs of 2-methoxyestradiol are described. Structural modifications include ring-D homologation, aromatization of the six-membered ring-D to a chrysine type molecule, and introduction of unsaturation in five-membered ring-D along with substitution of alkyl and ethynyl groups for the 17 beta-hydroxy function. of nine analogs synthesized, five have demonstrated superior antiproliferative activities compared to 2-methoxyestradiol. (C) 2007 Elsevier Inc. All rights reserved.
Microwave-Assisted Stereoselective Heterocyclization to Novel Ring d-fused Arylpyrazolines in the Estrone Series
作者:Gergő Mótyán、Barnabás Molnár、János Wölfling、Éva Frank
DOI:10.3390/molecules24030569
日期:——
16-benzylidene estrone 3-methyl ether with hydrazine in acetic acid resulted in a 2:1 diastereomeric mixture of two 16,17-cis fused pyrazolines, which is contrary to the former literature data for both stereoselectivity and product structure. However, the cyclization reactions of a mestranol-derived unsaturated ketone with different arylhydrazines in acidic ethanol furnished the heterocyclic products in good