4-Toluenesulfonyl chloride → 2H-Pyran, 2-(5-hexenyloxy)tetrahydro-

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Reaction Steps

To a solution of 8.5 g 5-hexen-1-ol in 100 ml tetrahydrofuran is added 14 ml dihydropyran followed by 0.5 g p-toluenesulfonyl chloride. The mixture is stirred at room temperature for 18 h and then diluted with ether. The mixture is then washed with saturated aqueous sodium bicarbonate, dried, filtered and evaporated. The resulting oil is chromatographed over silica gel using hexane/ether (18:1) as eluent to give 6-(2-tetrahydropyranyloxy)hex-1-ene; NMR (CDCl3): delta 5.85 (m,1H), 4.6 (brs,1H).

Provenance & Evidence