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:
Sep. 10, 1991
Filed:
Mar. 19, 1990
Henri Handel, Brest, FR;
Jean-Jacques Yaouanc, Locmaria-Plouzane, FR;
Ayoub F Zegzouti, Brest, FR;
Denis Malouala, Brest, FR;
Herve des Abbayes, Brest, FR;
Jean-Claude Clement, Coat-Meal, FR;
Helene Bernard, Plouguerneau, FR;
Guenaelle Le Gall, Fouesnant, FR;
Abstract
Process for the preparation of monofunctionalized cyclic tertramines of formula I ##STR1## in which R denotes a saturated or unsaturated, especially polymerizable, organic radical, characterized in that the corresponding tetraazacycloalkane compound (according to formula II) is prepared, in which three of the four nitrogen atoms are bonded via covalent bonds with a single atom or group of intracyclic atoms A, in that this triprotected compound is reacted with an organic compound RX (of formula III), X denoting a nucleophobic group, and in that the tetraazacycloalkane compound which is tri-protected and monofunctionalized on the unprotected nitrogen (according to formula IV) thus obtained is deprotected.