tert-Butyl acrylate → HCID 59456911, compound

Participants

Reaction Steps

A suspension of 7-bromo-4-methyl-1,3,4,5-tetrahydro-pyrido[2,3-e][1,4]diazepin-2-one (0.63 g, 2.5 mmol) in propionitrile (10 mL) and DMF (3 mL) was de-oxygenated with Ar for 25 min. The mixture was treated with tert-butyl acrylate (1.5 mL, 10 mmol) and (i-Pr)2EtN (0.9 mL, 5 mmol) and was de-oxygenated with Ar for 10 min. Pd(OAc)2 (56 mg, 0.25 mmol) and P(o-tol)3 (150 mg, 0.49 mmol) were added simultaneously, and the mixture was de-oxygenated a third time for 5 min. The mixture was heated to reflux for 18 h, then allowed to cool. The resulting precipitate was isolated by filtration, dissolved in CH2Cl2, filtered through Celite, and the solvent was removed in vacuo to give the title compound (0.60 g, 80%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.63 (s, 1H), 8.41 (d, J=2.0 Hz, 1H), 7.62 (d, J=1.7 Hz, 1H), 7.52 (d, J=16.0 Hz, 1H), 6.37 (d, J=16.0 Hz, 1H), 3.96 (s, 2H), 3.77 (s, 2H), 2.49 (s, 3H), 1.53 (s, 9H); MS (ESI) m/e 304 (M+H)+.

Provenance & Evidence