Ethanol → 2-Hydroxymethyl-4-methyl-8-[2'-(1-tert-butyl-1H-tetrazol-5-yl)biphenyl-4-ylmethyl]-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-one

Participants

Reaction Steps

A mixture of 8-[(4-bromophenyl)methyl]-2-hydroxymethyl-6-methyl-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-one (0.95 g, 2.62 mmol), 2-[(1-tert-butyl)-1H-tetrazol-5-yl]phenylboronic acid (0.72 g, 2.90 mmol) (prepared according to J. W. Ellingboe, et al. U.S. Pat. No. 5,149,699), 2M Na2CO3 (5.5 mL), tetrakis(triphenylphosphine)palladium(0) (100 tug, 0.086 mmol), EtOH (3 mL)and toluene (16 mL) was heated under reflux for 20 h. The mixture was diluted with CH2Cl2 and the layers were separated. The organic phase was dried (MgSO4) and concentrated to give an orange oil. Purification by flash chromatography (4% MeOH/CH2Cl2) gave 1.20 g (90%) of product as a colorless foam.

Provenance & Evidence