Ethynylpyridine → 2-{[(1R)-1,7,7-trimethylbicyclo[2.2.1]hept-2-en-2-yl]ethynyl}pyridine

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Reaction Steps

Reactants: 2-ethynylpyridine (6.0 mmol, 618 mg), (1R)-(+)-camphor (6.0 mmol, 912 mg); yields 2-{[(1R)-1,7,7-trimethylbicyclo[2.2.1]hept-2-e-n-2-yl]ethynyl }pyridine as a transparent yellow oil (125 mg, 9% overall yield). 1H NMR (CDCl3, 300 MHz) Δ8.57 (m, 1H), 7.64 (m, 1H), 7.43 (m, 1H), 7.17 (m, 1H), 6.49 (d, J=3 Hz, 1H), 2.41 (t, J=3 Hz, 1H), 1.92 (br m, 1H), 1.65 (m, 1H), 1.18 (m, 1H), 1.17 (s, 3H), 1.09 (br m, 1H), 0.84 (s, 3H), 0.82 (s, 3H). MS (EI ionization) 237 (M+).

Provenance & Evidence