Pyridine → HCID 58635315, compound

Participants

Reaction Steps

To a solution of (3R)-3-amino-4-{[tert-butyl(dimethyl)silyl]oxy}butan-1-ol (2.63 g, 12 mmol) in DCM (100 mL) at 0° C. was added pyridine (3 mL) followed by phosgene (20% solution in toluene, 1.9 M, 8.5 mL) dropwise and the mixture was stirred for 30 min and allowed to warm to rt, and quenched with water. The layers were separated and the water layer extracted with DCM once. The organic layers were dried over MgSO4, filtered and concentrated. The desired product (4R)-4-({[tert-butyl(dimethyl)silyl]oxy}methyl)-1,3-oxazinan-2-one was obtained from crystallization from ether/hexanes at −20° C. as a light yellow solid. 1H NMR (400 MHz, CDCl3) 5.52 (br s, 1H), 4.38–4.33 (m, 1H), 4.28–4.22 (m, 1H), 3.70–3.59 (m, 2H), 3.46 (t, 1H), 1.97–1.93 (m, 1H), 1.72–1.67 (m, 1H), 0.91 (s, 9H), 0.90 (s, 6H).

Provenance & Evidence