反应详情

温度

0 °C

Under argon atmosphere, to a solution of tert-butyl N-[2-{2-(6-chlorohexyloxy)ethoxy}ethyl]carbamate (11) (synthesized by the method described in Non-Patent Document Y. Zhang, M.-k. So, A. M. Loening, H. Yao, S. S. Gambhir, J. Rao, Angew. Chem. Int. Ed., 2006, 118, 4936-4940) (142 mg, 438 μmol) in dichloromethane (3.5 mL) was added trifluoroacetic acid (0.5 mL) at 0° C. After stirring for 2 hours at the same temperature of 0° C., the starting compound 11 completely disappeared as judged from TLC study (Rf=0.41, dichloromethane/methanol=9/1). The reaction solution was then concentrated under reduced pressure using an evaporator to give crude 2-[2-(6-chlorohexyloxy)ethoxy]ethylammonium trifluoroacetate (12) as a colorless oil. The product was used in the next step without further purification.

1. concentrationThe reaction solution was then concentrated under reduced pressure
2. customan evaporator