6,7-Dimethoxy-1,2,3,4-Tetrahydroisoquinoline → 4-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-6-(1H-pyrrolo[2,3-b]pyridin-5-yl)pyrido[3,2-d]pyrimidine

Participants

Reaction Conditions

Reaction Steps

0.20 g of 6-(1H-pyrrolo[2,3-b]pyridin-5-yl)-3H-pyrido[3,2-d]pyrimidin-4-one and 0.22 g of 6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline are suspended in 10 ml of acetonitrile and 1 ml of dimethylformamide in a flask. 0.65 g of (benzotriazol-1-yloxy)tris-(dimethylamino)phosphonium hexafluorophosphate, 255 μl of 1,8-diazabicyclo[5.4.0]undec-7-ene are subsequently added, and the mixture is heated at 60° C. under nitrogen until the reaction has proceeded to completion (HPLC check, about 5 hours). A precipitate precipitates out of the reaction solution. This is filtered off, rinsed with water and dried, giving 0.17 g of 4-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-6-(1H-pyrrolo[2,3-b]pyridin-5-yl)pyrido[3,2-d]pyrimidine (“A7”) as white solid (yield 50%, content 97%); MS-FAB (M+H+)=439; Rf (polar method): 1.68 min;

Provenance & Evidence