Tetrahydrofuran → 2-(5-Amino-2-ethoxyphenyl)-5-methyl-7-cyclopentyl-3H-imidazo[5,1-f][1,2,4]-triazin-4-one

Participants

Reaction Steps

In 86 ml of ethanol and 86 ml of tetrahydrofuran 2.56 g (6.68 mmol) of the compound from example 41A are stirred in the presence of 288 mg of Pd/C (10%) under an H2 atmosphere for 20 hours. The reaction solution is filtered with suction through 30 ml of silica gel, the filter cake is washed with ethanol/tetrahydrofuran and the filtrate is concentrated and dried under high vacuum overnight. The crude product is chromatographed on 500 ml of silica gel using toluene and ethyl acetate in a gradient system.

Provenance & Evidence