Triethylamine → HCID 25028946, compound

Participants

Reaction Conditions

Reaction Steps

(2R)-2-{[4-(4-bromophenyl)-1,3-thiazol-2-yl]amino}butan-1-ol (2.80 g, 8.56 mmol), prepared in the previous step, and triethylamine (10.5 mL, 60 mmol) in dry dichloromethane (75 mL) was cooled to 0° C. under a nitrogen atmosphere. Triphosgene (5.90 g, 20 mmol) in dry dichloromethane (25 mL) was then added drop wise. After 16 h, the mixture was washed with water and dried (anhydrous MgSO4). The crude product was recrystallized from diethyl ether to afford (4R)-3-[4-(4-bromophenyl)-1,3-thiazol-2-yl]-4-ethyl-1,3-oxazolidin-2-one (1.46 g, 4.1 mmol). mp 134-135° C.; [α]D25=−46° (c=0.0107 g/mL, DMSO); MS (ES) m/z 353.0; HPLC purity 100% at 210-370 nm, 10.8 min; 100% at 270 nm, 10.8 min; the Xterra® RP18 column, 3.5μ, 150×4.6 mm column, 1.2 mL/min, 85/15-5/95 (Ammon. Form. Buff. pH=3.5/ACN+MeOH) for 10 min, hold 4 min. Anal. Calcd for C14H13BrN2O2S: C, 47.60; H, 3.71; N, 7.93. Found: C, 47.45; H, 3.43; N, 7.74.

Provenance & Evidence