Tributyl(prop-1-yn-1-yl)stannane → HCID 11256520, compound

Participants

Reaction Conditions

Reaction Steps

2-[2-(3-(R)-Amino-piperidin-1-yl)-5-bromo-6-oxo-6H-pyrimidin-1-ylmethyl]-benzonitrile (Example 1) (120 mg, 0.31 mmol) and tributyl(1-propynyl)tin (140 μL, 0.46 mmol) were stirred in dioxane (5 mL) in a flask purged with nitrogen. Tetrakis(triphenylphosphine)palladium(0) (54 mg, 0.046 mmol) was added, and the solution stirred at 96° C. for 40 h. Concentration in vacuo and purification by silica gel chromatography (16% MeOH/CHCl3) gave 82 mg (76%) of the title compound as a clear oil. 1H NMR (400 MHz, MeOD-d4): δ 7.82 (s, 1H), 7.64 (d, 1H, 7.6 Hz), 7.53 (t, 1H, J=7.6 Hz), 7.36 (t, 1H, J=7.6 Hz), 7.16 (d, 1H, J=7.6 Hz), 5.30 (s, 2H), 3.40-3.48 (m, 1H), 3.21-3.30 (m, 1H), 2.78-2.89 (m, 2H), 2.58-2.66 (m, 1H), 1.91 (s, 3H), 1.85-1.93 (m, 1H), 1.52-1.74 (m, 2H), 1.18-1.27 (m, 1H). MS (ES) [m+H] calc'd for C20H21N5O, 348; found 348.

Provenance & Evidence