Formic Acid → 5,6,7,8-Tetrahydro(1)benzothieno(2,3-D)pyrimidin-4(3H)-one

関与物質

反応手順

To a mixture of 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophen-3-yl cyanide (0.9 g) and formic acid (10 mL) was added 0.1 mL conc. HCl. After refluxed for 16 h, the reaction mixture was cooled and water (20 mL) was added. The precipitate was collected by filtration and washed thoroughly with water and hexanes to give the title compound (0.8 g, 77%). 1H NMR (300 MHz, CDCl3): δ 7.91 (s, 1H), 3.03-3.00 (m, 2H), 2.80-2.77 (m, 2H), 1.89-1.83 (m, 4H).

情報源と証拠