Reaktion #75774

Reaktionsgleichung

N4-(3-butoxypropyl)[1,5]naphthyridine-3,4-diamine

valeryl chloride

→

1-(3-butoxypropyl)-2-butyl-1H-imidazo[4,5-c][1,5]naphthyridine

Ausbeute 63.1%

Reaktionsbedingungen

Vorschrift

Using the general method of Example 73 Part A and Part B, N4-(3-butoxypropyl)[1,5]naphthyridine-3,4-diamine (3.7 g, 13.5 mmol) was reacted with valeryl chloride (1.7 mL, 14.3 mmol) and the resulting amide intermediate was cyclized to provide 2.9 g of 1-(3-butoxypropyl)-2-butyl-1H-imidazo[4,5-c][1,5]naphthyridine as a colorless oil. A small portion was purified by flash chromatography (silica gel eluting with ethyl acetate) to provide a pure sample as a white powder, m.p. 56.5-57.5° C. Analysis: Calculated for C20H28N4O: %C, 70.56; %H, 8.29; %N, 16.46. Found: %C, 70.48; %H, 8.25; %N, 16.61. 1H NMR (300 MHz, CDCl3): δ9.32 (s, 1H), 8.90 (dd, J=4.3,1.6 Hz, 1H), 8.49 (dd, J=8.5,1.6 Hz, 1H), 7.57 (dd, J=8.5,4.3 Hz, 1H), 4.9 (t, J=7.0 Hz, 2H), 3.45-3.39 (m, 4H), 3.04 (t, J=7.9 Hz, 2H), 2.26 (pentet, J=6.1 Hz, 2H), 2.01-1.91 (m, 2H), 1.62-1.48 (m, 4H), 1.45-1.33 (m, 2H), 1.03 (t, J=7.3 Hz, 3H), 0.94 (t, J=7.3 Hz, 3H).

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