2',2'',2'''-Benzene-1,3,5-tribenzoic acid synthesis

Yield:955050-88-1 83%

Reaction Conditions:

with N-hydroxyphthalimide;malonic acid;tetrabutylammomium bromide;oxygen;palladium diacetate;acetic acid;cobalt(II) chloride;Dimethyl succinate at 160; under 3750.38 Torr; for 8 h;Reagent/catalyst;Temperature;Pressure;

Steps:

1.46 Example 1

General procedure: (46) Preparation of Y-type polybiphenylic acid from polymethylpolybiphenyl (formula (I) to (II)a=1),[1,3,5-tris(2-methylphenyl)benzene(cobalt chloride + palladium acetate)malonic acidtetrabutylammonium bromideN-hydroxyphthalimide,0.5MPa oxygen (dimethyl succinate + acetic acid)160°C8 hours (1.0/0.01/0.01/0.04/0.01)], operating the same as in Example 1,Yield 83%. _: (1) Preparation of Y-type polybiphenyl polycarboxylic acid from polymethylpolybiphenyl (formula (I) to (II)a=1),[1,3,5-tris(4-methylphenyl)benzene(cobalt chloride + acetylacetonate)2-aminopyridine sodium dodecyl fatty acid (2,2,6,6-tetramethyl piperidine nitrogen oxide (also known as Tempo) + potassium persulfate),1.0MPa Oxygen (dimethyl succinate + acetic acid)140°C24 hours(1.0/0.005/0.005/0.005/0.005)]

References:

CN107759460,2018,A Location in patent:Paragraph 0113-0134