Stannane, tributyl(1-ethoxyethenyl)- → HCID 18507607, compound

Participants

Reaction Steps

To a stirred solution of 300 mg (1.22 mmol) 2-amino-4-bromo-6-methylsulfanyl-pyrimidine-5-carbonitrile in 10 ml dioxane under argon at room temperature were added 0.41 ml (1.22 mmol) (1-ethoxyvinyl)tributylstannane and 86 mg (0.12 mmol) bis(triphenyl-phosphine)palladium(II) chloride. The reaction mixture was heated at reflux for 16 h, then cooled to room temperature, 2 g of kieselgel added, and the mixture concentrated in vacuo. Flash chromatography (hexane then 1/1 ethyl acetate/hexane) followed by trituration in ether/hexane afforded 140 mg (48%) 2-amino-4-(1-ethoxy-vinyl)-6-methylsulfanyl-pyrimidine-5-carbonitrile as a white crystalline solid. EI-MS m/e (%): 236 (M+, 17), 221 ([M—CH3]+, 61), 207 ([M—C2H5]+, 32), 192 ([M—C3H8]+, 100).

Provenance & Evidence