Synlett 2013; 24(16): 2107-2113
DOI: 10.1055/s-0033-1339519
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© Georg Thieme Verlag Stuttgart · New York

Expeditious Synthesis of Novel β-Lactam-Substituted Polycyclic Fused Chromeno Pyrrole Derivatives from MBH Carbonates by Intramolecular [3+2]-Cycloaddition Reaction

Raju Rajesh
Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, India   Fax: +91(44)22300488   eMail: ragharaghunathan@yahoo.com
,
Raghavachary Raghunathan*
Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, India   Fax: +91(44)22300488   eMail: ragharaghunathan@yahoo.com
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Publikationsverlauf

Received: 07. Mai 2013

Accepted after revision: 17. Juli 2013

Publikationsdatum:
28. August 2013 (online)


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Abstract

A facile synthesis of tri- and tetracyclic fused chromeno pyrrole derivatives has been accomplished by intramolecular cycloaddition reaction of azomethine ylides generated from cyclic/acyclic secondary amino acids with O-allylated salicylaldehydes obtained from Morita–Baylis–Hillman carbonates of β-lactam aldehyde. The stereochemistry of the cycloadducts was confirmed on the basis of single crystal X-ray diffraction data.