Banik BK, Banik I, Becker FF. Stereocontrolled synthesis of anticancer β-lactams via the Staudinger reaction.
Bioorg Med Chem 2005;
13:3611-22. [PMID:
15862989 DOI:
10.1016/j.bmc.2005.03.044]
[Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2005] [Revised: 03/15/2005] [Accepted: 03/24/2005] [Indexed: 11/21/2022]
Abstract
Stereocontrolled synthesis of novel beta-lactams using polyaromatic imines following the Staudinger reaction has been accomplished. The effects of domestic microwave irradiation on this type of reaction have been investigated. Formation of trans-beta-lactams has been explained through isomerization of the enolates formed during the reaction of acid chloride (equivalent) with imines in the presence of triethylamine. A donor-acceptor complex pathway is believed to be involved in the formation of cis-beta-lactams. The effect of a peri hydrogen has been found to be significant in controlling the stereochemistry of the resulting beta-lactams. SAR has identified beta-lactams with anticancer activity. The presence of an acetoxy group has proven obligatory for their anticancer activity.
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