Patents by Inventor Vsevolod Vasilievich Perekalin

Vsevolod Vasilievich Perekalin 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).

  • Process for producing .beta.-phenyl-.gamma.-amino butyric acid hydrochloride
    Patent number: 3947492
    Abstract: The invention relates to a new substance, namely the hydrochloride of .beta.-phenyl- .gamma.-aminobutyric acid of the following formula: ##EQU1## and to the process for its production which comprises condensing malonic ester with .beta.-nitrostyrene resulting in the separation of an ester of .gamma.-carbomethoxy-.beta.-phenyl-.gamma.-nitrobutyric acid at a temperature ranging from 0.degree. to 14.degree.C, reducing the ester thus obtained with hydrogen in the presence of the Raney nickel under a pressure of 6 to 30 atm, treating 3-carbomethoxy-4-phenyl-2-pyrrolidone, as formed by the reduction, with hydrochloric acid, and separating the desired product.
    Type: Grant
    Filed: April 9, 1973
    Date of Patent: March 30, 1976
    Inventors: Vsevolod Vasilievich Perekalin, Alexandra Semenovna Sopova, Maiva Mikhailovna Zobacheva, Rasma Yanovna Spunde, Uldis Yanovich Mikstais, Maiya Petrovna Silaya