反応 #75005

反応方程式

phthalimide

1,2-epoxybutane

chlorine

→

N-chlorophthalimide

溶媒

methylene chloride

反応条件

後処理

1. 1
   workup.STIRRINGto stir for an additional 24 hours
2. 2
   その他the resulting clear yellow solution was evaporated

実験手順

To 150 ml. of methylene chloride were added 7.35 g. (0.05 mole) of phthalimide, 21.5 ml. (5 equiv.) of 1,2-epoxybutane, and 0.061 g. (0.5 mmoles) of 4-dimethylaminopyridine. The mixture was cooled to 0° C. and saturated with chlorine. The resulting mixture was stirred for 20 hours at room temperature. A sample of the reaction mixture, analyzed by thin-layer chromatography (TLC), indicated that the reaction was not yet complete. The mixture was allowed to stir for an additional 24 hours, and the resulting clear yellow solution was evaporated to obtain crystalline N-chlorophthalimide. The product was vacuum dried to afford 7.7 g. (84.8%) of product. Analysis: (1) Percent Cl+ : Theory: 19.6; Found: 18.3. (2) Percent total chlorine: 18.1.

出典