Raising antibodies to a small, chemically simple molecule is difficult. Attempts have been made to develop a simple, sensitive and specific radioimmunoassay for the phenolic compound, o -hydroxyphenylacetic acid (OHPAA) (mol. wt. 152). To date, five different immunogens have been synthesized. ...
Process for the preparation of ortho-hydroxyphenylacetic acid, which consists in reacting 5-chloro-2-hydroxyphenylacetic acid, or one of its alkali metal salts, and a water-soluble hydrogen-donating agent in an aqueous medium in the presence of a hydrogen transfer catalyst.VALLEJOS JEAN-CLAUDE...
HIGH-PURITY ETHYLENEDIAMINE DI-ORTHO-HYDROXYPHENYLACETIC ACID AND SURFACE-TREATING COMPOSITION CONTAINING THE ACIDPROBLEM TO BE SOLVED: To obtain the subject compound having high purity and low metallic element content, effective for preventing the contamination of a substrate surface with metallic ...
IRON CHELATES F ETHYLENE BIS(ALPHA- IIVIINO ORTHO HYDROXYPHENYLACETIC ACID) AND METHOD OF OVERCOMING IRON DEFICIENCIES 1N GROWING PLANTS THERE- Martin Knell and Harry Kroll, Warwick, R.I., assignors to Geigy Chemical Corporation, a corporation of Delaware No Drawing. Application October 10, 1955...
Process for the preparation of ortho-hydroxyphenylacetic acid, which consists in reacting 5-chloro-2-hydroxyphenylacetic acid, or one of its alkali metal salts, and a water-soluble hydrogen-donating agent in an aqueous medium in the presence of a hydrogen transfer catalyst.YANI CHRISTIDIS...
Process for the preparation of ethylenediamine-N,N'-bis(ortho- hydroxyphenylacetic) acid and of derivatives of the latter by reaction of an appropriate phenol, glyoxylic acid and ethylenediamine in an aromatic polar solvent in the presence of an inorganic base and of a catalyst chosen from (i) ...
Process for the preparation of ethylenediamine-N,N'-bis(ortho- hydroxyphenylacetic) acid and of derivatives of the latter by reaction of an appropriate phenol, glyoxylic acid and ethylenediamine in an aromatic polar solvent in the presence of an inorganic base and of a catalyst chosen from (i) ...
;SOLUTION: This ethylenediamine di-o-hydroxyphenylacetic acid [e.g. ethylenediamine-N,N'-bis(o-hydroxyphenylacetic acid)] contains ≤5ppm of Fe, ≤2ppm of Al and ≤2ppm of Zn. It can be produced by dissolving the compound in an acidic or alkaline solution, removing the insoluble impurities...
It relates to a process for preparing ethylene diamine-N, N'-bis (ortho-hydroxyphenylacetic acid) and derivatives thereof, by reaction of an appropriate phenol, glyoxylic acid and ethylene diamine in a polar aromatic solvent in the presence of an inorganic base and a catalyst selected from i ...
The invention relates to the field of organic chemistry.; It relates to a process for preparing ethylene diamine-N, N'-bis (ortho-hydroxyphenylacetic acid) and derivatives thereof, by reaction of an appropriate phenol, glyoxylic acid and ethylene aromatic diamine in a polar solvent in the ...