Dimethylformamide dimethyl acetal → N'-[6-(2,6-dichlorophenyl)-7-[(dimethylamino)-methyleneamino]-pyrido[2,3-d]pyrimidin-2-yl]-N,N-dimethylformamidine

Beteiligte Stoffe

Reaktionsschritte

2,7-Diamino-6-(2,6-dichlorophenyl)-pyrido[2,3-d]-pyrimidine from Example 1 was reacted with DMF dimethyl acetal for 23 hours as described in Example 78. Workup as described above followed by purification on flash silica gel chromatography eluting sequentially with 100:0, 9:1, 4:1, and 7:3 ethyl acetate:methanol gave an oil that was crystallized from ethyl acetate to afford N'-[6-(2,6-dichlorophenyl)-7-[(dimethylamino)-methyleneamino]-pyrido[2,3-d]pyrimidin-2-yl]-N,N-dimethylformamidine, mp 269-272° C. CIMS (1% ammonia in methane): m/z (relative intensity) 418 (MH+ +2, 60), 416 (MH+, 100).

Herkunft & Nachweise