Phosphorus acid catalyst for preparation of 3,9-...

Details Phosphorus acid catalyst for preparation of 3,9-... Phosphorus acid catalyst for preparation of 3,9-...

C - Chemistry, Metallurgy

07

F

260/457.4

C07F 9/6574 (2006.01)

Patent

CA 1219275

PHOSPHORUS ACID CATALYST FOR PREPARATION OF 3,9-DICHLORO-2,4,8,10-TETRAOXA-3,9-DIPHOSPHA SPIRO [5,5] UNDECANE ABSTRACT: There is provided a process for reacting pentaerythritol with a trivalent phosphorus trihalide conducted in the presence of a phosphorus acid catalyst such as methyl acid phosphate. The reaction product is a useful intermediate for the preparation of flame retardants.

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