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:
Apr. 06, 1976
Filed:
Dec. 17, 1973
Cal Yale Meyers, Carbondale, IL (US);
Walter Sidney Matthews, III, Carbondale, IL (US);
Ashok M Malte, Poona, IN;
Southern Illinois University Foundation, Carbondale, IL (US);
Abstract
A process for preparing alkenes by reaction of various sulfone substrates with carbon tetrahalide in the presence of a strong base. The reactions are accelerated by the presence of a polar compound. Sulfone carbanions attack the carbon tetrahalide to produce an .alpha.-halogenated intermediate and a dihalocarbene. .alpha.-Halosulfones having .alpha.' hydrogens are converted to alkenes in situ via the Ramberg-Backland reaction. Sulfones having .alpha. but no .alpha.' hydrogens are simply .alpha.-halogenated. The dihalocarbene generated in the reaction may attack the product, solvent, or another substrate to form other products. Alkenes produced by reaction of carbon tetrahalides with di-sec-alkyl sulfones are readily attacked by dihalocarbene to form the alkene-dihalocarbene adduct (a substituted 1,1-dihalocyclopropane).