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:
May. 04, 1993
Filed:
Jul. 15, 1992
Applicant:
Inventors:
Franz Thalhammer, Trostberg, DE;
Stefan Weiss, Trostberg, DE;
Assignee:
SKW Trostberg Aktiengesellschaft, Trostberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
549449 ; 558-9 ; 549371 ;
Abstract
The present invention provides a process for the preparation of N-cyanoimidocarbonates of the general formula: ##STR1## in which R.sup.1 and R.sup.2 are the same and are alkyl radicals containing up to 4 carbon atoms or R.sup.1 and R.sup.2 are joined together to give an ethylene or propylene chain which is optionally substituted by an alkyl radical containing up to 3 carbon atoms, wherein an imidocarbonate obtained in aqueous alkaline solution from the appropriate alcohol and cyanogen chloride is added with an acid to an aqueous solution of cyanamide in such a manner that the reaction mixture has a pH value of from 3 to 8.