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. 20, 1988
Filed:
Aug. 19, 1985
Angus Chemical Company, Northbrook, IL (US);
Abstract
A method for making a bicyclic lactone comprising heating under aqueous acidic conditions a beta, gamma unsaturated cyclic nitrile and an aldehyde, for a length of time sufficient to convert at least a portion of the reactants to a bicyclic lactone of the formula ##STR1## wherein R.sub.3 is --H; R.sub.4, R.sub.5, and R.sub.6 are independently selected from the group consisting of --H, --CH.sub.3 ; R.sub.2 is selected from the group consisting of --H, --CH.sub.3, and --CH.sub.3, and --C.sub.2 H.sub.5 ; R.sub.8 is --H or --CH.sub.3 ; m is an integer from 1 to 5; o is 0, 1, 2, or 3; and p is 0, 1, or 2; provided that the sum of m+o+p is an integer from 3 to 5; either R.sub.3 or R.sub.8 together with R.sub.7 represents a carbon-carbon bond. The method uses commercially available and relatively inexpensive raw materials as reactants.