反应条件
1: 2,4-dioxo-1,4-dihydro-2H-benzo[d][1,3]oxazine; methylamine in tetrahydrofuran; 1,4-dioxane 1 h; 2: chloroacetyl chloride With pyridine in tetrahydrofuran; 1,4-dioxane; toluene 15 h; 3: With toluene-4-sulfonic acid in water; benzene T=70°C; 10 h;
