Tributylvinyltin → Methyl 4-(4-ethenyl-1-ethyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 4-(4-bromo-1-ethyl-1H-pyrazol-5-yl)-2-thiophenecarboxylate (200 mg, 0.64 mmol), Pd(Ph3P)4 (73.3 mg, 0.06 mmol), and tributyl(ethenyl)stannane (302 mg, 0.95 mmol) was heated at 90° C. for 1 h under N2 in a sealed tube. The mixture was purified on Silica (10P/0-20% EtOAc in Hex) to give the title compound (151 mg, 76%): LC-MS (ES) m/z 263 (M+H)+.

Provenance & Evidence