反应详情

The above aldehyde (0.66 g) was stirred in ethanol (5 ml) with triethyl orthoformate (0.6 ml) (ex Aldrich) and ammonium nitrate (ex Aldrich) (0.01 g) for 3.5 hours at 25°. Concentration in vacuo and work up in the usual manner gave E-1-(3,4-dichlorophenyl)-3,3-diethoxy but-1-ene (0.97g). NMR 1H: 7.32(3H,m), 6.79(1H,d), 6.19(1H,dd), 5.08(1H,d), 3.69(4H,m), 1.29(6H,m).

1. concentrationConcentration in vacuo