反应详情

To a zinc iodide suspension (0.21 g, 0.671 mmol) in 42 g (0.3 mol) of 2-hexyl-2-propenal there were added dropwise, at 60° C. and under nitrogen, 18.5 g (0.25 mol) of 2-methoxypropene. Once the introduction was completed (23 min), the reaction was allowed to continue for 6 h at 60° C. and the mixture was then distilled on a Vigreux column to give 8.16 g of 5-hexyl-3,4-dihydro-2-methoxy-2-methyl-2H-pyran (B.p. 73°-74°/3 Pa; yield 15.4%).

1. custom(23 min)
2. distillationthe mixture was then distilled on a Vigreux column