Process for the preparation of spiro bis-phosphites

Details Process for the preparation of spiro bis-phosphites Process for the preparation of spiro bis-phosphites

1998-03-26

1999-07-06

Ambrose, Michael G.

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

Organic compounds

Phosphorus esters

C07F 96574

Patent

active

059199660

ABSTRACT:
A process for producing organo-phosphites of the formula ##STR1## wherein R.sup.1 and R.sup.2 are each 2,4-di-tert-butyl and R.sup.3 is hydrogen is provided. The process involves heating a mixture of a pentaerythritol bis-phosphorohalidite and a phenolic compound and applying a vacuum of at least about 10 inches of mercury wherein the temperature of the reaction mixture is maintained between about 30.degree. C. and about 140.degree. C. Conversions to the organic spiro bis-phosphite is at least twice that of the same process without a vacuum.

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