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:
Oct. 30, 2007
Filed:
Mar. 29, 2004
Raghunath Vitthal Chaudhari, Maharashtra, IN;
Rashmi Chansarkar, Maharashtra, IN;
Kausik Mukhopadhyay, Maharashtra, IN;
Ashutosh Anant Kelkar, Maharashtra, IN;
Raghunath Vitthal Chaudhari, Maharashtra, IN;
Rashmi Chansarkar, Maharashtra, IN;
Kausik Mukhopadhyay, Maharashtra, IN;
Ashutosh Anant Kelkar, Maharashtra, IN;
Council of Scientific & Industriual Research, New Delhi, IN;
Abstract
The present invention relates to a process for the preparation of esters of hydroxy tiglic aldehydes which are the key intermediates for Vitamin-A acetate synthesis and various perfumistic products, said process relates to the hydroformylation of biscarboxylic esters of but-2-ene-1,4-diol, followed by deacetoxylation of its hydroformylation compound, in the presence of heterogeneous catalyst having rhodium complex entrapped, anchored or teethered on the acidic support, said acidic support causes deacetoxylation in the reaction mixture immediately after hydroformylation, to give 100% selectivity to the carboxylic esters of hydroxyl tiglic aldehydes in a single step.