1,1,3,3-Tetramethylguanidine → (Z)-methyl 2-(benzyloxycarbonylamino)-3-(5-phenyl-4-(pyridin-2-ylmethylamino)quinazolin-2-yl)acrylate

Participants

Reaction Steps

To a solution of 5-phenyl-4-(pyridin-2-ylmethylamino)quinazoline-2-carbaldehyde (0.9 g, 3 mmol) in THF (10 mL) was added methyl 2-benzyloxycarbonylamino-2(dimethoxyphosphinyl)acetate (0.96 g, 2.9 mmol) followed by tetramethyguanidine (0.66 mL. 5.3 mmol). The resulting solution was stirred at RT for 3 h. After this time, the reaction mixture was diluted with ethyl acetate, washed successively with water and brine, dried over Na2SO4, filtered then and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (30% ethyl acetate in hexane) to yield (Z)-methyl 2-(benzyloxycarbonylamino)-3-(5-phenyl-4-(pyridin-2-ylmethylamino)quinazolin-2-yl)acrylate (0.7 g (48% yield). LCMS Method V: retention time 1.94 min; [M+1]=546.0.

Provenance & Evidence