反应详情

Initially introduce 83.2 g (1.0 mol) of (E)-1-amino-2,4-pentadiene (title compound from Example B.2.) in 250 ml of MTBE, and add 0.1 g of 4-hydroxyanisole. Subsequently, at an internal temperature of 20°-30° C., add 229.2 g (1.05 mol) of di-tert-butyl dicarbonate dissolved in 250 ml of MTBE dropwise. After addition is complete, stir at room temperature for 20 h. Concentrate the reaction mixture and take up in 1 l of toluene. Add 103.0 g (1.05 mol) of maleic anhydride, and stir at an internal temperature of 60° C. for 24 h. Filter off the precipitate with suction, wash it with toluene and dry it at 50° C. to constant weight.