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. 23, 1988
Filed:
Aug. 11, 1987
Applicant:
Inventors:
Robert D Rossi, Levittown, PA (US);
Steven P Fenelli, Hillsborough, NJ (US);
Assignee:
National Starch and Chemical Corporation, Bridgewater, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568436 ; 564274 ;
Abstract
A multi-step process for the preparation of ethynylbenzaldehydes from bromo- or iodobenzaldehydes is disclosed. The arylhalogen is replaced with a protected ethynyl compound which is subsequently cleaved by base to form the arylacetylene. The aldehydic functionality is preserved by formation of a corresponding Schiff's base or acetal, and its subsequent regeneration by treatment with aqueous acid.