Potassium Phosphate, Tribasic → 8-(Tert-butyldimethylsilyloxy)-2-(6-cyclopropyl-[1,2,4]triazolo[4,3-a]pyridin-3-yl)quinoline

Participants

Reaction Steps

2-(6-Bromo-[1,2,4]triazolo[4,3-a]pyridin-3-yl)-8-(tert-butyldimethylsilyloxy)quinoline (0.500 g, 1.10 mmol), cyclopropylboronic acid (0.123 g, 1.43 mmol), Pd(OAc)2 (0.012 g, 0.0549 mmol), P(Cy)3 (0.031 g, 0.110 mmol), and K3PO4 (0.699 g, 3.29 mmol) were combined with 5.5 mL toluene and 0.55 mL H2O (both degassed with nitrogen 30 minutes prior to use). The mixture was sonicated and put on a 100° C. reaction block and stirred for 3 hours. The reaction mixture was cooled to ambient temperature, diluted with toluene, vacuum filtered through compressed Celite, rinsed with toluene, and the filtrate was concentrated. The crude material was purified on silica (5% to 60% ethyl acetate in dichloromethane) to give the title compound (0.159 g, 0.382 mmol, 34.8% yield) as a brown foam.

Provenance & Evidence