9-benzyloxy-6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione → 9-Benzyloxy-2-isopropyl-6-[1-(4-trifluoromethyl-phenyl)-cyclopentylmethyl]-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione

Participants

Reaction Steps

9-Benzyloxy-2-isopropyl-6-[1-(4-trifluoromethyl-phenyl)-cyclopentylmethyl]-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (247) (40 mg, 45.93%) as a white sticky solid was synthesized from 5-benzyloxy-6-hydroxy-2-[1-(4-trifluoromethyl-phenyl)-cyclopentylmethyl]-pyrimidine-4-carboxylic acid (2-hydroxyethyl)-isopropylamide (246) (90 mg, 0.16 mmol) following the procedure as described for 9-benzyloxy-6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (208). Silica thin layer chromatography was performed (ethyl acetate, Rf=0.3).

Provenance & Evidence