Triethylamine → HCID 58109414, compound

Participants

Reaction Steps

To a 16 mm culture tube with a Teflon-coated stirring bar, a solution of (R)-6-allyl-3-((S)-1-(4-bromophenyl)ethyl)-6-(4-fluorophenyl)-1,3-oxazinan-2-one (87 mg, 0.209 mmol) in dry DMSO (4 mL) and dry methanol (1.5 mL), triethylamine (60 μL, 2 equiv), Pd(OAc)2 (10 mg, 0.2 equiv) and 1,3-bis(diphenylphosphino)propane (35 mg, 0.4 equiv) were added. The tube was sealed with a septum and Parafilm tape. The reaction mixture was purged with CO gas through a long needle for 1 min. A balloon filled with CO gas was attached to maintain a CO atmosphere. The reaction mixture was submerged in an oil bath preheated to 85° C. and stirred vigorously. After 12 h, LC-MS showed the reaction was complete. The mixture was filtered through a thin pad of Celite. The Celite was washed with EtOAc (35 mL). The filtrate was washed with 3% aq HCl (10 mL), water (2×8 mL) and brine (2×7 mL), and dried over Na2SO4. After filtration and concentration, the residue was purified by chromatography on a 12-g silica gel cartridge eluted with a 10-60% EtOAc in hexanes gradient to afford methyl 4-((S)-1-((R)-6-allyl-6-(4-fluorophenyl)-2-oxo-1,3-oxazinan-3-yl)ethyl)benzoate (68.4 mg, 83%). LC-MS Method 1, tR=1.79 min, m/z=398. 1H NMR (CDCl3) 7.79 (d, 2H), 7.26 (m, 2H), 7.04 (t, 2H), 6.94 (d, 2H), 5.69 (m, m, 2H), 5.07 (dd, 2H), 3.89 (s, 3H), 2.94 (m, 1H), 2.58 (m, 2H), 1.54 (d, 3H).

Provenance & Evidence