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:
Mar. 21, 1995
Filed:
Jun. 11, 1993
Applicant:
Inventors:
Jean Buendia, Le Perreux Sur Marne, FR;
Veronique Crocq, Paris, FR;
Christian Masson, Mouy, FR;
Denis Prat, Pantin, FR;
Michel Vivat, Lagny Sur Marne, FR;
Assignee:
Roussel-Uclaf, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07J / ; C07J / ; C07J / ; C07J / ;
U.S. Cl.
CPC ...
540 30 ; 540 34 ; 552524 ; 552540 ; 552544 ; 552546 ; 552548 ; 552552 ; 552553 ; 552556 ; 435 51 ; 435 52 ; 435 53 ; 435 55 ; 435 61 ;
Abstract
A process for the preparation of a compound of the formula ##STR1## wherein R.sub.1 is alkyl of 1 to 3 carbon atoms, R.sub.2 is alkyl of 1 to 12 carbon atoms, R.sub.3 is alkyl of 1 to 4 carbon atoms comprising reacting a compound of the formula ##STR2## wherein R.sub.4 is a remainder of an easily cleavable ether, K is a protected ketone function in the form of ketal, thioketal or mixed ketal and R.sub.1 has the above definition with a magnesium organic compound reagent of the formula