反应详情

温度

-40 °C

5-(3-Chloro-benzylamino)-2-methyl-2H-pyrazole-3-carboxylic acid methyl ester (646, 0.944 g, 3.37 mmol) was combined with tetrahydrofuran (20 mL) and the solution was cooled to −40° C. 1.0M lithium tetrahydroaluminate in tetrahydrofuran (3.7 mL) was added and the reaction was stirred for 45 min at −20° C. 1.0M lithium tetrahydroaluminate in tetrahydrofuran (3.7 mL) was added at −40° C. and the reaction was stirred to 10° C. Sodium sulfate decahydrate was added in small portions and the mixture was stirred for two hours at room temperature, then filtered through Celite and concentrated. The resulting compound (647, 0.821 g, 97%) was washed with a mixture of ethyl acetate:hexanes and dried under reduced pressure.

1. stirringthe reaction was stirred to 10° C
2. stirringthe mixture was stirred for two hours at room temperature
3. filtrationfiltered through Celite
4. concentrationconcentrated
5. washThe resulting compound (647, 0.821 g, 97%) was washed with a mixture of ethyl acetate
6. dry with materialhexanes and dried under reduced pressure