2-Thioxo-1,2,3,5,6,7-hexahydro-4h-benzo[6,7]cyclohepta[1,2-d]pyrimidin-4-one → 3,5,6,7-tetrahydro-4H-benzo[6,7]cyclohepta[1,2-d]pyrimidin-4-one

Participants

Reaction Steps

A solution of Example 118A (170 mg, 0.7 mmol) in methanol (15 mL) was treated with Raney nickel (slurry in H2O, 1 spatula) and refluxed for 16 hours. The mixture was filtered through diatomaceous earth and washed with methanol. The filtrate was concentrated under vacuum to provide the title compound. 1H NMR (CD3OD) δ 2.24 (t, 2H), 2.40 (t, 2H), 2.59 (t, 2H), 7.27-7.34 (m, 1H), 7.36-7.42 (m, 2H), 7.60-7.66 (m, 1H), 8.14-8.18 (m, 1H). MS (M+H)+ m/z 213

Provenance & Evidence