Patents by Inventor Olga I. Shulepova

Olga I. Shulepova has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 1-1-Binaphthyl-4,4',5,5',8,8'-hexacarboxylic acid compounds, method of preparation and use thereof for the synthesis of asymmetric derivatives of 3,4,9,10-perylenetetracarboxylic acid, and for dyeing and printing of textile materials
    Patent number: 4336383
    Abstract: 1,1'-Binaphthyl-4,4',5,5',8,8'-hexacarboxylic acid compounds having the following formula: ##STR1## wherein R.sub.1 is hydrogen, halogen, or alkyl; when X is oxygen, Y is hydrogen, alkyl, a cycloalkyl, or an aryl containing at least one substituent from the group including: halogen, alkyl, or alkoxy, when X is nitrogen, Y is ##STR2## wherein R.sub.2 is hydrogen, halogen, or alkyl; Y being linked to X with the formation of a benzimidazole cycle.The method for preparing the compounds according to the present invention resides in the treatment of that 1,1'-binaphthyl-4,4',5,5',8,8'-hexacarboxylic acid anhydride with an alkali to give a corresponding salt which is condensed with orthophenylenediamines upon heating at reflux at a pH of from 6.3 to 6.8. The resulting benzimidazole-1,1'-binaphthyl-4,4',5,5',8,8'-hexacarboxylic acid anhydride having the formula: ##STR3## wherein R.sub.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: June 22, 1982
    Inventors: Georgy N. Vorozhtsov, Natalia N. Masanova, Nikolai B. Feldbljum, Vasily I. Alexeev, Vadim A. Shigalevsky, Georgy G. Solomatin, Olga I. Shulepova, Galina G. Khaitun, Nadezhda V. Gordeeva