The preparation of ring-A fused steroidal dehydropiperazine at the 3,4-position is herein described. The novel steroidal dehydropiperazines were prepared from the annulation reaction of ethylenediamine with 3-keto-4-en steroids in a one-pot reaction under microwave irradiation. The key step involves base catalysed aerial oxidation of the C-6 methylene group followed by cyclocondensation of ethylenediamine via Michael addition reaction. (C) 2008 Elsevier Inc. All rights reserved.
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Molteni, Valentina
Hamilton, Matthew M.
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Hamilton, Matthew M.
Mao, Long
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Deltagen Research Laboratories, 4570 Executive Drive, San Diego, CA 92121, United StatesDeltagen Research Laboratories, 4570 Executive Drive, San Diego, CA 92121, United States
Mao, Long
Crane, Christine M.
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Crane, Christine M.
Termin, Andreas P.
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Termin, Andreas P.
Wilson, Dean M.
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