Process to prepare a multidentate phosphite compound

Details Process to prepare a multidentate phosphite compound Process to prepare a multidentate phosphite compound

1996-03-15

1998-01-20

Ambrose, Michael G.

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

Organic compounds

Phosphorus esters

C07F 9145

Patent

active

057103062

ABSTRACT:
A process to prepare a multidentate phosphite compound according to the general formula (1) ##STR1## in which n is 2-6, R is an n-valent organic group and R.sup.1 and R.sup.2 are fused aromatic ring systems with 2 or more rings, which rings are substituted on the ortho position relative to the oxygen atom only with hydrogen, by first preparing a phosphorochloridite compound from a R.sup.1 --OH and R.sup.2 --OH alcohol compound and a phosphorus chloride compound and subsequently contacting the phosphorochloridite compound with an alcoholic compound according to R--(OH).sub.n, wherein the phosphorochloridite is prepared by performing the two steps in a solvent:

REFERENCES:
patent: 4668651 (1987-05-01), Billig et al.
patent: 5235113 (1993-08-01), Sato et al.
Perich, John W. and R.B. Johns; Synthesis Feb. 1988: (2), 142-144.

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