反应详情

A solution of (R)-2-aminopent-4-enoic acid (18d) (5 g, 43.5 mmol) in MeOH.HCl (2.4M, 50 mL) was stirred at 70° C. overnight. The mixture was concentrated under reduced pressure to give compound 18e (5.5 g, 98% yield), which was used without purification.

1. concentrationThe mixture was concentrated under reduced pressure