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:
Feb. 06, 1996
Filed:
Nov. 04, 1994
Apurba Bhattacharya, Corpus Christi, TX (US);
Hoechst Celanese Corporation, Somerville, NJ (US);
Abstract
The present invention provides a novel process for preparing cyclic ketones, such as indanones, which comprises the steps of (a) subjecting a substituted ketone to suitable methylenation conditions in the presence of a methylene transfer agent and an acylating agent for a sufficient period of time and under suitable conditions of temperature and pressure to form the corresponding alpha, beta unsaturated ketone, and (b) subjecting said unsaturated ketone to suitable cyclization conditions in the presence of a suitable acid or base for a sufficient period of time and under suitable conditions of temperature and pressure to form said cyclic ketones.