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:
May. 26, 1992
Filed:
Nov. 19, 1990
Applicant:
Inventor:
Ponnampalam Mathiaparanam, Appleton, WI (US);
Assignee:
Appleton Papers Inc., Appleton, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544144 ; 544142 ; 544143 ; 546200 ; 546201 ; 548452 ; 548454 ; 548455 ;
Abstract
A process for producing a bis-(indolyl)ethylene of the formula ##STR1## is described, wherein A, B, a, b, R, Z, R.sup.5', R.sup.6 and R.sup.6' are as defined in the specification, said method comprising reacting an indole of the formula ##STR2## with an acylindole of the formula in the presence of a Vilsmeier reagent selected from the group consisting of phosphoryl chloride, phosgene, oxalyl chloride, benzoyl chloride, thionyl chloride, alkanesulfonyl chloride, arene-sulfonyl chloride, alkylchoroformate, and arylchloroformate, together with a Lewis Acid selected from the group consisting of zinc chloride, boron trifluoride and aluminum chloride.