Triethylamine → HCID 66645641, compound

Participants

Reaction Conditions

Reaction Steps

A cooled (−40° C.) solution of cyclopropylacetic acid (5.13 g, 51.250 mmol) in anhydrous tetrahydrofuran (150 mL) was subsequently treated with triethylamine (21.4 mL, 153.75 mmol) and trimethylacetyl chloride (6.9 mL, 56.375 mmol). After stirring at −40° C. for 1 h, the mixture was treated with (S)-4-benzyl-oxazolidin-2-one (9.99 g, 56.375 mmol) and lithium chloride (2.39 g, 56.375 mmol). The mixture was allowed to slowly warm to room temperature and after stirring at room temperature for 22 h, the reaction was partitioned between dichloromethane and half-saturated ammonium chloride. The aqueous layer was extracted with dichloromethane. The organics were combined, filtered through a phase separator and the volatiles were removed in vacuo. The residue was purified by silica gel chromatography using a 100 g Isolute cartridge eluted with a continuous gradient of iso-hexanes/ethyl acetate 1:0 to 9:1 to afford the title compound (11.63 g, 87%) as a colorless oil. 1H NMR (300 MHz, CDCl3) δ 0.19-0.32 (m, 2H), 0.56-0.69 (m, 2H), 1.10-1.24 (m, 1H), 2.76-2.87 (m, 2H), 2.96 (dd, J=16.9, 6.9 Hz, 1H), 3.34 (dd, J=13.2, 3.3 Hz, 1H), 4.15-4.29 (m, 2H), 4.66-4.77 (m, 1H), 7.20-7.40 (m, 5H). LCMS (m/z) 282.1 [M+Na], Tr=2.78 min.

Provenance & Evidence