71527-66-7Relevant academic research and scientific papers
Process for preparing esters of 3,5,6-trichlorosalicyclic acid
-
, (2008/06/13)
An improved process for the synthesis of esters of 3,5,6-trichlorosalicylic acid in quantitative yield comprises reacting the acid with an alcohol under distillation conditions in the presence of a titanium ester or chelate catalyst, whereby byproduct ether formation from the alcohol is suppressed. The process is especially applicable to a process by which salicylic acid is chlorinated first in concentrated sulfuric acid and then with iodine catalyst to make the trichlorosalicylic acid which is extracted and then reacted with an alcohol and a titanium catalyst to make the ester.
Synthesis and Evaluation of Diaryl Oxalate Esters for Low-Intensity Chemiluminescent Illumination
Dowd, Christopher D.,Paul, D. Brenton
, p. 73 - 86 (2007/10/02)
Various diaryl oxalate esters have been prepared from oxalyl chloride and substituted salicylates.A number of intermediates and byproducts were obtained from chlorinations of salicylic acid and their mechanistic significance has been discussed.The chemiluminescent emission from the oxalates in the presence of hydrogen peroxide has been examined in the search for low-intensity illumination of at least 10 h duration.Bis(2-alkoxycarbonyl-4,6-dinitrophenyl) oxalates were too unstable while the chemiluminescence of the bis(6-alkoxycarbonyl-2,4,5-trichlorophenyl) oxalates c ould not be adjusted suitably.Some bis(6-alkoxycarbonyl-2,4-dichlorophenyl) oxalates were prepared and, by treatment with various combinations of potassium salicylate and oxalic acid, satisfactory low-intensity light emission could be achieved.
