Diisopropylethylamine → 2-{4-[(R)-1-(2-Methoxy-pyrimidin-5-yl)-ethylamino]-7,8-dihydro-5H-pyrido[4,3-d]pyrimidin-6-yl}-5-methyl-benzonitrile

Participants

Reaction Steps

A reaction mixture of 2-(4-chloro-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)-5-methylbenzonitrile (430 mg, 1.51 mmol) and (R)-1-(2-methoxypyrimidin-5-yl)ethanamine (238 mg, 1.56 mmol) (prepared similarly according to the method for Intermediate 16) in acetonitrile (6 mL) and N,N-diisopropylethylamine (2 mL, 9 mmol) was subjected to microwave irradiation at 185° C. for 3.5 h. The reaction mixture was concentrated and the residue was purified by semi-preparative HPLC (100×20.2 mm, C18 column; 30-60% acetonitrile-water [10 mM Et2NH]) to yield a light yellow solid.

Provenance & Evidence