The 1,3-dipolar cycloaddition of azomethine ylides generated in situ from the reaction of isatins or acenaphthylene-1,2-dione and 1,3-thiazolane-4-carboxylic acid to various exocyclic dipolarophiles synthesized from estrone afforded a library of novel C-16 Spiro oxindole or acenaphthylene-1-one - 7-(aryl)tetrahydro-1H-pyrrolo[1,2-c][1,3]thiazole - estrone hybrid heterocycles. These reactions occur regio- and stereo-selectively affording a single isomer of the Spiro estrones in excellent yields with the formation of two C-C and one C-N bonds along with the generation of four new contiguous stereo-centers in a single step. (C) 2014 Elsevier Inc. All rights reserved.
Modification of Estrone at the 6, 16, and 17 Positions: Novel Potent Inhibitors of 17β-Hydroxysteroid Dehydrogenase Type 1
作者:Gillian M. Allan、Harshani R. Lawrence、Josephine Cornet、Christian Bubert、Delphine S. Fischer、Nigel Vicker、Andrew Smith、Helena J. Tutill、Atul Purohit、Joanna M. Day、Mary F. Mahon、Michael J. Reed、Barry V. L. Potter
DOI:10.1021/jm050830t
日期:2006.2.1
androgens and estrogens at the 17 position. The 17beta-HSD type 1 enzyme (17beta-HSD1) catalyzes the reduction of estrone to estradiol and is expressed in malignant breast cells. Inhibitors of this enzyme thus have potential as treatments for hormone dependent breast cancer. Here we report the syntheses and biological evaluation of novel inhibitors based on the estrone or estradiol template. These have