1.
Org Biomol Chem
; 12(43): 8619-26, 2014 Nov 21.
Artigo
em Inglês
| MEDLINE
| ID: mdl-25231547
RESUMO
Cyclization-carbonylation of α,ß-alkynic hydrazones and (o-alkynylphenyl) (methoxymethyl) sulfides with Pd(tfa)2 in DMSO/MeOH afforded methyl pyrazole-4-carboxylates and benzo[b]thiophene-3-carboxylates, respectively, in good yields. A simple change of the ligand (solvent) allowed controlled, effective switching between cyclization-carbonylation-cyclization-coupling (CCC-coupling) reactions and cyclization-carbonylation reactions.