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. 12, 1980
Filed:
Apr. 28, 1978
Applicant:
Inventors:
Pier P Castelli, Monza, IT;
Bruno Romano, Besana Brianza, IT;
Assignee:
Blasinachim S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
2602 / ; 2602 / ;
Abstract
The invention relates to a new process for the preparation of 6.alpha.-halo-3-keto-.DELTA..sup.1,4 -pregnadiene-derivatives in two-steps-synthesis affording directly 6.alpha.-halo-derivatives by reacting 3-keto-9.beta.,11.beta.-oxido-.DELTA..sup.1,4 -pregnadiene-derivatives with a suitable acylating or etherifying agent to give the corresponding new 3-enol-derivatives which are finally halogenated by using a suitable halogenating agent.