反应详情

A 1M solution of lithium aluminum hydride in THF (6.98 mL, 6.98 mmol) was added dropwise to a stirred solution of 2-(2-tert-butoxycarbonylamino-ethyl)-5-phenoxymethyl-2H-pyrazole-3-carboxylic acid ethyl ester (2.72 g, 6.98 mmol) in THF (47 mL) under N2 at 0° C. The mixture was stirred at room temperature for 1 hour and diluted with AcOEt. Na2SO4.10H2O was added at 0° C. and the mixture was stirred for 15 minutes at this temperature, filtered through a pad of diatomaceous earth and then washed with additional AcOEt. The solvents were evaporated in vacuo to yield [2-(5-hydroxymethyl-3-phenoxymethyl-pyrazol-1-yl)-ethyl]-carbamic acid tert-butyl ester (2.5 g, 76% yield) as a white solid that was used in the next step without further purification.

1. stirringthe mixture was stirred for 15 minutes at this temperature
2. filtrationfiltered through a pad of diatomaceous earth
3. washwashed with additional AcOEt
4. customThe solvents were evaporated in vacuo