期刊
STEROIDS
卷 76, 期 3, 页码 280-290出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.steroids.2010.11.008
关键词
Iodo-alkene; Carboxamide; Androstane; Palladium catalyst; Carbonylation
资金
- Hungarian National Science Foundation (NKTH-OTKA) [CK78553]
- Science, Please! Research Team on Innovation [SROP-4.2.2./08/1/2008-0011]
3,17-Dicarboxamido-androst-3,5,16-triene, 3-carboxamido-androst-3,5-dien-17-one, 17-carboxamidoandrost-4,16-dien-3-one and 11-carboxamido-androst-5,9(11)-dien-3,17-dione derivatives were synthesized in homogeneous carbonylation reactions from the corresponding 3,17-diiodo-androst-3,5,16-triene, 3-iodo-androst-3,5-diene-17-ethylene ketal, 17-iodo-androst-5,16-dien-3-ethylene ketal, 11-iodo-androst-5,9(11)-diene-3,17-bis(ethylene ketal) derivatives, respectively. A highly chemoselective palladium-catalyzed aminocarbonylation of the corresponding iodo-alkene, carried out under mild reaction conditions, can be considered as the key-step for the introduction of the carboxamide functionalities. The synthesis of the iodo-alkene substrate is based on the transformation of the corresponding keto derivative to hydrazone, which was treated with iodine in the presence of a base (1,1,3,3-tetramethyl guanidine). The aminocarbonylation reaction is highly tolerant towards the N-nucleophiles, i.e. various primary and secondary amines including amino acid methyl esters can also be used. (C) 2010 Elsevier Inc. All rights reserved.
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