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. 16, 1977
Filed:
Feb. 04, 1976
Paolo Koch, San Giuliano Milanese, IT;
Emilio Perrotti, San Donato Milanese, IT;
Snam Progetti S.p.A., San Donato Milanese, IT;
Abstract
A ketonic heterocyclic compound having at least two heteroatoms in the ring is prepared by reacting a difunctional compound having the general formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are members of the group consisting of aliphatic, aromatic, cycloaliphatic and heterocyclic hydrocarbons which may contain functional groups selected from --OH, --OR.sub.5, --COOH, --COOR.sub.5, --CN, --Cl, --Br, --I, --F, and --CO--R.sub.5, wherein R.sub.5 is an aliphatic, aromatic, cycloaliphatic or heterocyclic hydrocarbon; X is oxygen or sulphur; Y is sulphur or nitrogen; n is an integer ranging from 1 to 3, or zero; R.sub.6 is a hydrogen or a hydrocarbon radical included in the above definition of R.sub.1 R.sub.2 R.sub.3 and R.sub.4 ; and m is the valence of Y, with carbon monoxide and oxygen in the presence of a catalyst selected from selenium, selenium compounds and complexes of copper, in the temperature range of from room temperature to 80.degree. C and in the pressure range of from 1 to 10 atmospheres.