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:
Oct. 21, 1980
Filed:
Oct. 20, 1978
Laszlo Toke, Budapest, HU;
Gabor T Szabo, Budapest, HU;
Gabor Szabo, Budapest, HU;
Lajos Nagy, Szentendre, HU;
Istvan Rusznak, Budapest, HU;
Chinoin Gyogyszer es Vegyeszeti Termeker Gyara Rt., Budapest, HU;
Abstract
The invention relates to a process for nucleophilic substitution reactions. According to the invention the reaction is carried out in a heterogeneous system, consisting of a solid and a dissolved reactant, one or several organic solvents, one or several linear polyether derivatives, and/or amino compounds and water. The volume of the water is preferably at the most 100% of the volume of the organic solvent and more preferably 5%. According to the invention the anhydrous reaction medium which is difficult to ensure, is not necessary and the use of the expensive and in industrial scales unavailable crown ethers is eliminated.