Method for preparing cyclic phosphate compound and derivative thereof

A method for preparing a cyclic phosphate compound and a derivative thereof, the cyclic phosphate compound being a compound of formula (III) or a compound of formula (IV) each containing a diaryl structural unit,

• wherein in the formula (III) or the formula (IV), R1 represents one selected from the group consisting of hydrogen, halogen, alkenyl, nitro, cyano, trifluoromethyl, trifluoromethoxy, alkyl, alkoxy, substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, naphthyl, anthracenyl, phenanthrenyl, pyridyl, thienyl, and a benzo group;
• Ar represents one selected from the group consisting of phenyl, naphthyl, anthracenyl, phenanthrenyl, pyridyl, and thienyl;
• and n represents carbon number and is an integer of 0 or greater than 0;
• and
• the method comprising:
• step 1) adding a compound of formula (I), a compound of formula (II), and a solvent to a reactor, and then adding white phosphorus and a first base in sequence, followed by heating while stirring to obtain a mixed solution of reactants;
• and step 2) adding a second base to the mixed solution of reactants obtained in step 1), and subjecting a resulting mixture to heating and reaction;
• at end of the reaction, stopping the heating and then cooling a resulting reaction product to room temperature;
• and adding an acid to the reactor and conducting acidification to obtain the compound of formula (III) or the compound of formula (IV),
• wherein in the formula (I) and the formula (II), R1 and R2 independently represent one selected from the group consisting of hydrogen, halogen, alkenyl, nitro, cyano, trifluoromethyl, trifluoromethoxy, alkyl, alkoxy, substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, naphthyl, anthracenyl, phenanthrenyl, pyridyl, and thienyl;
• Ar in the formula (I) represents one selected from the group consisting of phenyl, naphthyl, anthracenyl, phenanthrenyl, pyridyl, and thienyl;
• n in the formula (I) represents carbon number and is an integer of 0 or greater than 0;
• and X in the formula (II) represents one selected from the group consisting of S, Se, and Te.