290305-62-3Relevant academic research and scientific papers
Efficient synthesis of γ-alkylidenetetronic esters by sequential lewis acid catalyzed [3 + 2] cyclizations and palladium-catalyzed cross-coupling reactions
Langer,Eckardt,Schneider,Goebel,Herbst-Irmer
, p. 2222 - 2226 (2001)
A new approach for the synthesis of γ-alkylidenetetronic acids and esters is reported which involves Me3SiOTf-catalyzed, regio- and stereoselective cyclization of 4-alkoxy-1,3-bis(trimethylsilyloxy)-1,3-butadienes with oxalyl chloride. The α-hydroxy group of the butenolides is efficiently functionalized by palladium-catalyzed cross-coupling reactions via the corresponding enol triflates.
