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1.
J Org Chem ; 80(4): 2407-12, 2015 Feb 20.
Artigo em Inglês | MEDLINE | ID: mdl-25611673

RESUMO

A novel and efficient protocol for the regioselective synthesis of 3-styrylcoumarins from readily available cinnamic acids and coumarins is presented. The reaction proceeds via a decarboxylative cross-coupling mediated by a catalytic amount of Pd(OAc)2, with Ag2CO3 as an oxidant, and with 1,10-phenanthroline as a ligand. A plausible reaction mechanism for this process is depicted, and the resulting 3-styrylcoumarins show excellent fluorescence quantum yields.

2.
Org Lett ; 16(2): 580-3, 2014 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-24359214

RESUMO

A new rare earth metal and samarium-catalyzed C(sp(3))-H bond activation is reported in which 2-alkylazaarenes and propargylic alcohols were converted to indolizines. This process operates under mild conditions and solvent-free conditions. A broad scope of coupling partners has been established, and a likely mechanism has also been suggested.


Assuntos
Alcinos/química , Compostos Aza/química , Indolizinas/síntese química , Propanóis/química , Samário/química , Catálise , Indolizinas/química , Estrutura Molecular
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