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. 31, 1995
Filed:
Sep. 06, 1994
Applicant:
Inventors:
Assignee:
WAKO Pure Chemical Industries, Ltd., Kawagoe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
5483651 ;
Abstract
Novel and improved simple process for preparing a 1,2-pyrazolidine-4-yl-disulfide compound represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are, independently each other, a hydrogen atom or an amino-protecting group. This compound may be prepared by reacting a compound of the formula: ##STR2## wherein R.sup.3 is an acid anion residue group, and R.sup.1 and R.sup.2 have the same meanings as above, with a disulfide compound selected from the group consisting of an alkali metal disulfide, an alkali earth metal disulfide, an ammonium disulfide and a tri-alkylammonium disulfide.