Process for preparing phosphoric esters

Details Process for preparing phosphoric esters Process for preparing phosphoric esters

2007-06-26

2007-06-26

McKane, Joseph K. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

Reexamination Certificate

active

10476495

ABSTRACT:
A process for preparing a phosphoric ester, comprising: Step (1) of reacting naphthol with phosphorus oxychloride in a molar ratio of 1:1.3 or more in the presence of a metallic halide and removing unreacted phosphorus oxychloride and Step (2) of reacting the reaction product of Step (1) with phenol in a molar ratio (molar ratio of chlorine contained in the reaction product to phenol) of 1:1–1.5 and removing hydrogen chloride produced as a by-product to thereby obtain a phosphoric ester represented by the general formula (I):wherein n is 1 or 2.

REFERENCES:
patent: 3356471 (1967-12-01), Niedzielski
patent: 4442239 (1984-04-01), Tsunekawa et al.
patent: 4683255 (1987-07-01), Sugio et al.
patent: 5104450 (1992-04-01), Sand et al.
patent: 2093458 (1982-09-01), None
patent: 49-19861 (1974-05-01), None
patent: 61-200163 (1986-09-01), None
patent: 2000-239286 (2000-09-01), None
patent: 92/05219 (1992-04-01), None
patent: 00/49024 (2000-08-01), None
English Language Abstract of JP 61-200163, published Sep. 4, 1986.
English Language Abstract of JP 2000-239286, published Sep. 5, 2000.

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