Trifluoroacetic acid → HCID 54725631, compound

Participants

Reaction Steps

Reaction of intermediate 16, ethyl 3-benzyloxy-9-methyl-4,8-dioxo-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidine-2-carboxylate, (0.413 g, 1.16 mmol) with trifluoroacetic acid (20 ml) as described in the preparation of intermediate 5 gave 0.264 g (85% yield) of the title ester as white crystals, mp 182° C. (ethyl acetate/hexane). 1HNMR 400 MHz (CDCl3) δ (ppm): 1.44 (3H, t, J=7.1 Hz, CH3), 2.80 (2H, t, J=6.8 Hz, CH2), 3.43 (3H, s, NCH3), 4.28 (2H, t, J=6.8 Hz, CH2), 4.46 (2H, q, J=7.1 Hz, OCH2), 10.48 (1H, s, OH). Anal. Calcd for C11H13N3O5: C, 49.43; H, 4.90; N, 15.72. Found: C, 49.39; H, 4.89; N, 15.75.

Provenance & Evidence