Tandem Henry/oxa-Michael route to the 1,3-disubstituted-1,3-dihydrobenzo[c]furan system

Autor: Otome E. Okoromoba, Frederick A. Luzzio
Rok vydání: 2011
Předmět:
Zdroj: Tetrahedron Letters. 52:6530-6533
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2011.09.123
Popis: The reaction of ortho -formyl cinnamates and ortho -formyl-α-benzalketones with suitably substituted alkylnitro compounds in the presence of 1,1,3,3-tetramethylguanidine results in the formation of 1,3-disubstituted dihydroisobenzofurans. The reaction mechanism entails a base-mediated nitronate addition to the aryl formyl group followed by intramolecular alcoholate addition to the unsaturated component that then affords the isobenzofuran system.
Databáze: OpenAIRE