ortho-Formylation of estrogens. Synthesis of the anti-cancer agent 2-methoxyestradiol
摘要:
Several estrogens were mono-formylated using a mixture of paraformaldehyde. MgCl2, and Et3N in refluxing THF. In all cases, the 2-isomer was formed as the major product with high regioselectivity compared to the 4-isomer. Excellent to high yields were obtained in all examples except one. The method was applied for an efficient synthesis of the anti-cancer agent 2-methoxyestradiol. (C) 2011 Elsevier Ltd. All rights reserved.
Structure−Activity Relationships of 17α-Derivatives of Estradiol as Inhibitors of Steroid Sulfatase
作者:Roch P. Boivin、Van Luu-The、Roger Lachance、Fernand Labrie、Donald Poirier
DOI:10.1021/jm0001166
日期:2000.11.1
inhibit steroidsulfataseactivity may be a rewarding approach to the treatment of androgeno-sensitive and estrogeno-sensitive diseases. In the present study, we report the chemical synthesis and biological evaluation of a new family of steroidsulfatase inhibitors. The inhibitors were designed by adding an alkyl, a phenyl, a benzyl, or a benzyl substituted at position 17alpha of estradiol (E(2)), a C18-steroid
The development of a lead-free replacement for the Lindlar catalyst for alkyne semi-hydrogenation using silica supported, N-doped carbon modified cobalt nanoparticles
The synthesis of vitamin precursors via alkyne semi-hydrogenation has been achieved with a lead- and palladium-free catalyst. Cobalt nanoparticles modified by nitrogen doped carbon and supported on silica allow the production of a range of fine chemicals and vitamin precursors. The optimal catalyst could be conveniently recycled and used for at least five runs with consistent activity. Interestingly