Sodium Hydroxide → HCID 131728264, compound

Participants

Reaction Conditions

Reaction Steps

8.88 ml of triethylamine are added to a solution of 6.67 g of 4(S)-(3-carboxy-2,2-dimethyl-propyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester in 200 ml of methylene chloride under argon. The mixture is cooled to 15° C. and 5.54 g of bis(2-oxo-3-oxazolidinyl)phosphinic chloride are added. The mixture is stirred at room temperature for 2 hours. A solution of 4.36 g of (1,2,3,4-tetrahydro-quinolin-3(R,S)-yl)-carbamic acid methyl ester [177202-73-2] in 100 ml of methylene chloride is added, followed by addition of 2.11 g of 4-N,N-dimethylaminopyridine. The reaction mixture is stirred at room temperature for 17 hours. The mixture is poured into 1M NaOH and extracted with tert-butyl methyl ether (2×). The combined organic layers are washed with water and brine, dried over sodium sulphate, filtered and concentrated. The title compound is obtained as a slightly yellow oil from the residue by means of flash chromatography (SiO2 60 F). Rf=0.39 (1:3 EtOAc-heptane); Rt=5.03 (gradient I).

Provenance & Evidence