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:
Jun. 15, 1993
Filed:
May. 24, 1989
Applicant:
Inventors:
Marcus Baumann, Basel, CH;
Walter Fischer, Reinach, CH;
Vratislav Kvita, Reinach, CH;
Carl W Mayer, Reihen, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ; C07F / ;
U.S. Cl.
CPC ...
556489 ; 556419 ; 556415 ; 556422 ; 556438 ; 556431 ; 558387 ; 558388 ; 558406 ; 558410 ; 558411 ; 568583 ; 568626 ; 568634 ; 568 56 ; 560-8 ; 560 10 ; 560 17 ; 560 21 ; 560 43 ; 562427 ; 562435 ; 562457 ; 564161 ; 564191 ;
Abstract
Benzocyclobutene-1,2-dichlorides, -bromides and -iodides which are substituted in the benzene ring are accessible in good yields and short reaction times by reacting substituted 1,2-(dichloromethyl or dibromomethyl)-benzenes with NaI in acetonitrile as the solvent. They can be used together with dienophils, for example 1,4-quinones, in Diels-Alder reactions.