Verfahren zur Herstellung einer mehrzahnigen Phosphit-Verbindung

摘要

A process to prepare a multidentate phosphite compound according to the general formula (1) in which n is 2-6, R is an n-valent organic group and R1 and R2 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 R1-OH and R2-OH alcohol compound and a phosphorus chloride compound and subsequently contacting the phosphorochloridite compound with an alcoholic compound according to R-(OH)n, wherein the phosphorochloridite is prepared by performing the two steps in a solvent: a) contacting a compound with the general formula: (2) in which R3 and R4 are C1-C4 alkyl groups, with the R1OH and R2OH compounds, and b) contacting the resulting compound of step (a) which has the formula (3): (3) with HY, wherein Y is a halogen.