反应详情

Benzyl acrylate (19.4 g, 120 mmol) was cooled in a two neck 250 ml round bottom flask to approximately 5° C. To this was added dropwise HMPT (2.14 g, 133.1 mmol) at such a rate as to maintain a temperature of 5°-10° C. Once addition was complete the ice/water bath was removed and the mixture allowed to warm to room temperature. Stirring was continued overnight. The clear yellow liquid was added directly to a silica gel column (4 cm*40 cm) and eluted with a gradient (19:1-9:1) solvent system (hexane/EtOAc). The fractions containing the desired material were combined and evaporated to give 1 (10.1 g, 52%) as a clear and colorless liquid. TLC Rf 0.26 (9:1, Hex./EtOAc)

1. temperatureto maintain a temperature of 5°-10° C
2. additionOnce addition
3. customwas removed
4. additionThe clear yellow liquid was added directly to a silica gel column (4 cm*40 cm)
5. washeluted with a gradient (19:1-9:1) solvent system (hexane/EtOAc)
6. additionThe fractions containing the desired material
7. customevaporated