Acetonitrile → HCID 135530149, compound

Participants

Reaction Steps

The product from stage e) (0.25 mmol) was suspended in triethylamine (2 ml) and trimethylsilylacetylene (0.39 mmol) and acetonitrile (2 ml to try and solubilise reactants). Pd(PPh3)2Cl2 (0.006 mmol) and cuprous iodide (0.006 mmol) were added and the reaction mixture stirred. After 1 h a further portion of trimethylsilylacetylene (0.19 mmol) was added and stirring continued for 2 h. The solvent was evaporated and the residue partitioned between ethyl acetate and water. The organics were washed with brine, dried (MgSO4) and concentrated. Purification by flash column chromatography (gradient elution from 100% dichloromethane to 99% dichloromethane/methanol) gave the title compound; 1H NMR (400MHz, MeOD): δ=0.25 (s, 9H), 1.05 (t, 3H), 1.31 (t, 3H), 1.44 (s, 9H), 1.87-1.96 (m, 2H), 3.00 (q, 2H), 4.33 (t, 2H), 4.52 (t, 2H), 4.54-4.80 (m, 2H), 5.18-5.25 (m, 1H), 8.32 (d, 1H), 8.74 (d, 1H); LRMS (TSP—positive ion) 569 (MNH4+), 452.0 (MH+); Anal. Found C, 60.82;H, 6.90; N, 15.15 Calcd for C28H38O4N6Si: C, 61.07;H, 6.95; N, 15.26.

Provenance & Evidence