Potassium Iodide → 1-Dodec-7-ynyl-3-methyl-pyridinium iodide

Participants

Reaction Steps

12-Chloro-dodec-5-yne (1 mmol) was mixed with potassium iodide (3 mmol) and 3-picoline (3 mmol) in butanone. The mixture was refluxed for 3 days and cooled to room temperature, filtrated. The butanone was removed in a vacuum, and the resulting residue was partitioned between water and ethyl ether. The aqueous layer was washed extensively with ether until no 3-picoline was left in the aqueous layer. The resulting aqueous solution of the product was extracted with chloroform. The chloroform was removed to afford the product (82%). 1HNMR (300 MHz, CDCl3, ppm) 9.36 (s, 1H), 9.18 (d, 1H), 8.24 (d, 1H), 8.00 (dd, 1H), 4.92 (t, 2H), 2.62 (s, 3H), 1.95-2.18 (m, 6H), 1.15-1.25 (br, 10H), 0.90 (t, 3H); 13CNMR, 145.51, 144.12, 144.78, 139.46, 127.56, 80.44, 79.42, 61.75, 31.72, 31.16, 28.65, 28.04, 25.52, 21.92, 18.75, 18.55, 18.40, 13.63.

Provenance & Evidence