Synthesis of tyrosine derived diphenol monomers

Details Synthesis of tyrosine derived diphenol monomers Synthesis of tyrosine derived diphenol monomers

1995-03-31

1996-12-24

Conrad, Joseph

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

Organic compounds

Carboxylic acid esters

528176, 528182, 528206, C07C22928, C07C22934

Patent

active

055875076

ABSTRACT:
A method for preparing diphenol compounds, which method includes the steps of coupling a hydroxyphenyl carboxylic acid with a L-tyrosine ester in a water-miscible organic reaction solvent containing a carbodiimide capable of forming a water-soluble urea by-product, thereby forming a diphenol reaction product; and combining the reaction mixture with an amount of water effective to precipitate the diphenol as a water-immiscible organic phase, so that a water-immiscible organic phase is formed containing the diphenol reaction product. New diphenol monomers and polymers polymerized therefrom are also disclosed.

REFERENCES:
patent: 4638045 (1987-01-01), Kohn et al.
patent: 5198507 (1993-03-01), Kohn et al.
patent: 5216115 (1993-06-01), Kohn et al.

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