TY - JOUR T1 - Bromine-induced facile synthesis of butenolides and spirobutenolides from sterically congested tetrasubstituted dialkyl alkylidene succinates JF - Synthesis-Stuttgart Y1 - 2010 A1 - Patel, Ramesh M. A1 - N. P. Argade KW - alkylidene succinates KW - bromine KW - butenolides KW - intramolecular cyclizations KW - spirobutenolides AB -

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.

PB - GEORG THIEME VERLAG KG CY - RUDIGERSTR 14, D-70469 STUTTGART, GERMANY IS - 7 U3 - Foreign U4 - 2.260 ER -