2,4,6-Trivinylboroxin-Pyridine Complex → HCID 66933582, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 5-bromo-2-isopropoxy-3-methyl-pyridine (1.24 g, 5.39 mmol) and 2,4,6-trivinylcyclotriboroxane pyridine complex (1.27 g, 5.26 mmol) in DME (12 mL) and 2 M aq. K2CO3 (5 mL) is degassed and put under argon before Pd(PPh3)4 (112 mg, 0.097 mmol) is added. The mixture is stirred at 80° C. for 15 h before it is cooled to rt, diluted with ether (50 mL), washed with sat. aq. NaHCO3 solution (2×30 mL), dried over MgSO4, filtered and concentrated. The crude product is purified by CC on silica gel eluting with heptane:EA 9:1 to give 2-isopropoxy-3-methyl-5-vinyl-pyridine (703 mg) as pale yellow oil; LC-MS: tR=1.01 min; [M+1]+=178.11.

Provenance & Evidence