The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1999
Filed:
May. 29, 1996
Alive Keshavaraja, Maharashtra, IN;
Vishnumurthy Ramachandra Hegde, Maharashtra, IN;
Pradeep Kumar, Maharashtra, IN;
Sooryakant Ganesh Hegde, Maharashtra, IN;
Arumugamangalam Venkataraman Ramaswamy, Maharashtra, IN;
Thottappillil Ravindranathan, Maharashtra, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
A process for the preparation of organic compounds through C--C bond forming reaction which comprises reacting a diene with a dienophile in the presence of solid acid based on either yttrium, scandium or lanthanum supported on metal oxide supports such as oxides of zirconium or tin or titanium or iron oxide modified by sulphation as catalysts for a period ranging from 5 to 48 hours and recovering the reaction products from the reaction mixture by filtration and removal of the solvent by evaporation followed by column chromatography.