作者:Vladimir A. Khripach、Vladimir N. Zhabinskii、Anna I. Kuchto、Yuliya Y. Zhiburtovich、Natalya B. Khripach、Alexander S. Lyakhov、Marinus B. Groen、Jaap van der Louw、Aede de Groot
DOI:10.1016/j.steroids.2008.07.005
日期:2008.12
A number of 5,10-seco analogs of testosterone has been synthesized starting from products of the radical oxidation of 3 beta,17 beta-diacetoxy-5 alpha-androstan-5 alpha-ol. The obtained compounds possess a flexible 10-membered ring with substituents (=O, -OH) at C-3 and C-5. Similar derivatives with an (E)- and (Z)-Delta(1(10))-double bond have been prepared also. X-ray analysis and a combination of NMR experiments have been used for their structure elucidation and conformation analysis. (C) 2008 Published by Elsevier Inc.
Tinant, B.; Declercq, J. P.; Meerssche, M. Van, Bulletin des Societes Chimiques Belges, 1988, vol. 97, # 7, p. 485 - 492
作者:Tinant, B.、Declercq, J. P.、Meerssche, M. Van、Mihailovic, M. Lj.、Lorenc, Lj.、et al.
DOI:——
日期:——
Intramolecular cycloaddition/cycloreversion of (E)-3β,17β-diacetoxy-5,10-secoandrost-1(10)-en-5-one
作者:Vladimir A. Khripach、Vladimir N. Zhabinskii、Anna I. Kuchto、Yuliya Y. Zhiburtovich、Vladimir V. Gromak、Marinus B. Groen、Jaap van der Louw、Aede de Groot
DOI:10.1016/j.tetlet.2006.07.096
日期:2006.9
Treatment of 3 beta,17 beta-diacetoxy-5,10-secoandrost-1(10)-en-5-one with (BF3Et2O)-Et-. was shown to proceed with cleavage of the macrocycle and formation of a new compound containing a cyclopentenone ring. Based on DFT calculations, an intramolecular Lewis acid promoted [2+2]cycloaddition, followed by a cycloreversion of the intermediate oxetane, is proposed as a possible reaction mechanism. (c) 2006 Elsevier Ltd. All rights reserved.