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Synthesis 2010(7): 1188-1194
DOI: 10.1055/s-0029-1219233
DOI: 10.1055/s-0029-1219233
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Bromine-Induced Facile Synthesis of Butenolides and Spirobutenolides from Sterically Congested Tetrasubstituted Dialkyl Alkylidene Succinates
Further Information
Received
26 November 2009
Publication Date:
20 January 2010 (online)
Publication History
Publication Date:
20 January 2010 (online)
Abstract
Starting from sterically congested tetrasubstituted dialkyl alkylidene succinates, facile general approach to several dialkyl substituted butenolides and spirobutenolides with the generation of quaternary carbon center has been demonstrated via bromine-induced dealkylative regioselective intramolecular cyclization and dehydrobromination pathway. The mechanistic aspects involved in the formation of butenolides have been also described in brief.
Key words
alkylidene succinates - bromine - intramolecular cyclizations - butenolides - spirobutenolides
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