Tetrahydrofuran → HCID 66734434, compound

Participants

Reaction Conditions

Reaction Steps

To a cooled (−78° C.) colorless solution of 3-ethyl-1-formyl-8-[2-(4-trifluoromethyl-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester (19.9 mg; 0.044 mmol) in anhydrous toluene (2 ml) was added dropwise 1M DIBAL in THF (88 μl; 2 eq.). The resulting yellow homogeneous solution was further stirred at −78° C. for 10 min., and then at rt for 1 h. The resulting crude mixture was purified by preparative HPLC to give the pure product 3-ethyl-1-hydroxymethyl-8-[2-(4-trifluoromethyl-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester (16 mg; 0.035 mmol; 80%). LC-MS: tR=0.91 min.; [M+H]+=454.27 g/mol.

Provenance & Evidence