To a mixture of [4-(cyclopropyl-methyl-amino)-5,6,7,8-tetrahydro-benzo[4,5]thieno[2,3-d]pyrimidin-2-yl]-methanol (0.25 g, 0.00086 mol), 3-hydroxypyridine (0.090 g, 0.00095 mol) & triphenylphosphine (0.24 g, 0.00095 mol) in THF (20 ml) was added DIAD (0.19 g, 0.00095 mol) in THF (5 ml), and the mixture was stirred at room temperature for 12 h. The reaction mixture was concentrated and the resulting crude material was purified by preparative HPLC to give cyclopropyl-methyl-[2-(pyridine-3-yloxymethyl)-5,6,7,8-tetrahydro-benzo[4,5]thieno[2,3-d]pyrimidin-4-yl]-amine (35 mg, 11%) as a brown residue. 1H NMR (400 MHz, CDCl3): δ 0.35-0.42 (m, 2H), 0.62-0.68 (m, 2H), 1.72-1.78 (m, 2H), 1.88-1.97 (m, 2H), 2.80-2.90 (m, 5H), 3.00 (s, 3H), 5.24 (s, 2H), 7.16 (dd, 1H), 7.30 (dd, 1H), 8.17 (dd, 1H), 8.42 (d, 1H); LC-MS: [M+H]=367.3 m/z.
