Methylamine ethanol → HCID 67750310, compound

Participants

Reaction Steps

A 5.3M methylamine-ethanol solution (5 ml, 26.6 mmol) was added to 3-[(2S,4R)-4-tert-butyldimethylsiloxy-N-(p-nitrobenzyloxycarbonyl)pyrrolidin-2-yl]acrylic acid ethyl ester (2.94 g, 6.15 mmol, compound of Reference Example 1-6 of Japanese Patent Application No. 342,948/1989) at room temperature, and the mixture was left to stand at the same temperature for 2 days. The reaction mixture was concentrated under reduced pressure, and the residue was subjected to silica gel column chromatography (Wakogel™ C-300, ethyl acetate) to obtain 3-methylamino-3-[(2S,4R)-4-tert-butyldimethylsiloxy-N-(p-nitrobenzyloxycarbonyl)pyrrolidin-2-yl]propionic acid ethyl ester (1.67 g, yield: 53.3%).

Provenance & Evidence