Process for the preparation of organophosphorus derivatives of 2

Details Process for the preparation of organophosphorus derivatives of 2 Process for the preparation of organophosphorus derivatives of 2

1989-12-19

1992-04-28

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

260665G, 558134, 558144, 558156, C07B 4900, C07F 948, C08K 55333

Patent

active

051090430

ABSTRACT:
A process for the preparation of organophosphorus derivatives of 2,4-di-tert-butylphenol with a high proportion of organophosphorus derivatives of biphenyl, which comprises reacting, in a first step, a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35, under Grignard conditions with magnesium to form the corresponding Grignard compound and this is further reacted in a second step with bis(2,4-di-tert-butylphenyl) chlorophosphite with the formation of a mixture in which at least 50% by weight of the phosphorus is combined in the form of tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylenediphosphonite. The invention further relates to a polyolefin molding composition containing tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylenediphosphonite which was prepared by reaction of a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 with magnesium to form the Grignard compound and by subsequent reaction with bis(2,4-di-tert-butylphenyl) chlorophosphite. The invention furthermore relates to a process for the preparation of 4,4'-dihalomagnesium compounds of biphenyl by reacting a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 in the absence of an entrainer, with fine-particle magnesium which is held in suspension.

REFERENCES:
patent: 3203908 (1965-08-01), Kitasaki et al.
patent: 3285855 (1966-11-01), Dexter et al.
patent: 3422059 (1969-01-01), Taylor et al.
patent: 3825629 (1974-07-01), Hofer et al.
patent: 3954847 (1976-05-01), Hofer et al.
patent: 4075163 (1978-02-01), Hofer et al.
patent: 4187212 (1980-02-01), Zinke et al.
patent: 4739000 (1988-04-01), Burton
Kazakov et al.: Sint. Metody, Osn. Elementoorg. Soedin 1982.
CA 79 (1973) 73428h.
K. Sasse, Houben-Weyl, Metboden der organischen Chemie XII/1.
Kirk-Othmer Encyclopedia of Chemical Technology, vol. 20, pp. 773-781 (1969).

Affiliated with

Also associated with

Rating

Process for the preparation of organophosphorus derivatives of 2 does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of organophosphorus derivatives of 2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of organophosphorus derivatives of 2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1249897