Hydrochloric Acid → N-[3-chloro-4-(pyridin-2-ylmethoxy)phenyl]-5,8-dihydro-6H-spiro[1-benzothieno[2,3-d]pyrimidine-7,2'-[1,3]dioxolan]-4-amine hydrochloride

Participants

Reaction Conditions

Reaction Steps

To ethanol (60 mL) were sequentially added 4-chloro-5,8-dihydro-6H-spiro[1-benzothieno[2,3-d]pyrimidine-7,2′-[1,3]dioxolane] (5.70 g, 20.2 mmol), 3-Chloro-4-(pyridin-2-ylmethoxyl)-phenylamine (4.78 g, 20.37 mmol), and HCl in ethanol (1N, 4 mL). The suspension was stirred with heating to 80° C., upon which time the contents turn brown and homogeneous. After 12 h, the dark orange-yellow heterogeneous mixture was removed from heating, and allowed to cool to rt. The contents were concentrated down to about 30 mL in volume and the precipitate was collected by filtration as a light-brown solid (10.1 g, 92%). 1H-NMR (DMSO-d6) δ 8.71 (d, 1H), 8.40 (s, 1H), 8.33 (s, 1H), 8.10 (td, 1H), 7.80 (d, 1H), 7.75 (d, 1H), 7.56 (m, 2H), 7.25 (d, 1H), 5.48 (br, 1H), 5.38 (s, 2H), 3.99 (s, 4H), 3.28 (t, 2H), 3.03 (s, 2H), 1.97 (t, 2H); LCMS RT=2.73 min; [M+H]+=481.1.

Provenance & Evidence