반응 #75005

반응 방정식

phthalimide

1,2-epoxybutane

chlorine

→

N-chlorophthalimide

용매

methylene chloride

반응 조건

후처리

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

실험 절차

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.

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