Triethylamine → HCID 57506714, compound

Participants

Reaction Steps

To a solution of L-Serine methyl ester hydrochloride (Aldrich, 5.0 g, 32.0 mmoles), in CH2Cl2 (150 mL) at 0° C., were added Et3N (4.88 mL, 35.2 mmoles), Cbz-D-Proline (8.01 g, 32.0 mmoles) and DCC (7.26 g, 35.2 mmoles) sequentially. The reaction was allowed to warm to room temperature and stirred overnight. All the solvent was evaporated and the residue was triturated with ethyl acetate and the precipitate was filtered off. The filtrate was concentrated under low pressure and chromatographed on silica gel (70% ethyl acetate/30% chloroform) to yield 8.5 g of (R)-benzyl 2-((S)-3-hydroxy-1-methoxy-1-oxopropan-2-ylcarbamoyl)pyrrolidine-1-carboxylate.

Provenance & Evidence