Cesium carbonate → 1,1-Dimethylethyl 3',6'-dihydro-5-(2-pyrimidinyl)[2,4'-bipyridine]-1'(2'h)-carboxylate

Participants

Reaction Steps

Refluxed mixture of 2-(6-Bromo-pyridin-3-yl)-pyrimidine (1Q) (200 mg, 0.85 mmol), N-tert-butoxycarbonyl-1,2,3,6-tetrahydropyridine-4-boronic acid, pinacol ester (290 mg, 0.93 mmol); Cesium Carbonate (500 mg, 1.538 mmol); PdCl2dppf (30 mg) in dioxane/H2O (10 ml v/v 4/1) for 4 hours. Cooled reaction, then evaporated solvent. Extracted with EtOAc (200 ml) washed with H2O (50 ml), dried over MgSO4, filtered and solvent evaporated yielding a solid which chromatographed on silica gel eluting with 30% v/v acetone/hexanes yielding 2Q as a white solid (110 mg, 38%) ESMS (MH, 339).

Provenance & Evidence