反应详情

DIPEA (27 mL) was added to a chloroform (0.20 L) suspension of 4-iodobenzoyl chloride (13 g) and N,N2,O-trimethyl-3-oxoserinamide hydrochloride (Intermediate 5-2, 10 g) under ice cooling, and the mixture was stirred for 4 hours at room temperature, whereafter the reaction mixture was concentrated. The resulting residue was purified by OH type silica gel column chromatography (gradient elution with hexane/ethyl acetate=70/30→0/100) to obtain 1-iodo-4-{[1-methoxy-3-(methylamino)-1,3-dioxopropan-2-yl](methyl)carbamoyl}benzene (Intermediate 6-2, white solid) (14 g, 68%).

1. concentrationwas concentrated
2. customThe resulting residue was purified by OH type silica gel column chromatography (gradient elution with hexane/ethyl acetate=70/30→0/100)