Methyl Acetate → HCID 68731966, compound

Participants

Reaction Steps

A solution of i-Pr2NH in THF (25 mL) was cooled to −78° C., n-BuLi (2.5M, 2 mL) was added and the solution was stirred for 1 h. Then methyl acetate (4.48 mmol, 278 mg) was added and the mixture was stirred for 30 min. To this solution Ti(Oi-Pr)3Cl (1 M, 9.4 mL) was added. After 0.5 h, (S)-2-methyl-N-(1-phenylethylidene)propane-2-sulfinamide (500 mg, 2.24 mmol) dissolved in THF (1 mL) was added. The mixture was stirred at −78° C. for 3 h. The reaction was quenched with NH4Cl and warmed to rt. The mixture was diluted with water and filtered. The solid was washed with H2O/EtOAc and filtered. The combined organic layers were washed with brine, dried over Na2SO4, and concentrated. The residue was purified by preparative TLC to afford (R)-methyl 3-((S)-1,1-dimethylethylsulfinamido)-3-phenylbutanoate (305 mg, 46%). 1H NMR (CDCl3): 1.24 (s, 9H), 1.68 (s, 3H), 3.08 (s, 2H), 3.53 (s, 3H), 5.46 (s, 1H), 7.15-7.18 (m, 1H), 7.23-7.30 (m, 2H), 7.30-7.36 (m, 2H).

Provenance & Evidence