| 摘要 |
PROBLEM TO BE SOLVED: To profitably obtain a 3-aryldihydro-1,3-benzoxazine compound in a good work environment in a state capable of simply treating waste liquids and waste gases by reacting a phenol compound with formalin and an aromatic primary amine in the presence of a specific catalyst in a substantially organic solvent-free aqueous solution. SOLUTION: This method for producing a 3-aryldihydro-1,3-benzoxazine compound of the formula [(n) is 1-4; R1 is an aryl; R2 is a mono- to tetra-valent organic group] comprises reacting (A) a phenol compound with (B) formalin and (C) an aromatic primary amine in the presence of (D) a secondary or tertiary aliphatic amine or a basic nitrogen-containing heterocyclic compound as a catalyst in a substantially organic solvent-free aqueous solution. The water solvent in the reaction system is preferably contained in an amount of 0.5-5 pts.wt. per pts.wt. of the component A. The secondary aliphatic amine of the component D is preferably contained in an amount of 0.5-10 mol.% per mole of the component A, and the tertiary aliphatic amine or the basic nitrogen- containing heterocyclic compound is also preferably contained in an amount of 0.5-100 mol.%.
|
