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:
Nov. 05, 1996
Filed:
May. 11, 1995
Koji Hayashi, Yokkaichi, JP;
Sho Tokumoto, Yokkaichi, JP;
Hiroshi Yoshizawa, Yokkaichi, JP;
Tatsuo Isogai, Yokkaichi, JP;
Masaru Kimura, Yokkaichi, JP;
Masahiko Sawaki, Yokkaichi, JP;
Takayoshi Ando, Yokkaichi, JP;
Isamu Katsuyama, Kasugai, JP;
Hayato Ariyoshi, Yokkaichi, JP;
Tadashi Nakamura, Yokkaichi, JP;
Ishihara Sangyo Kaisha Ltd., Osaka, JP;
Abstract
A method for producing 2-methylspiro(1,3-oxathiolane-5,3')quinuclidine, which comprises reacting 3-hydroxy-3-mercaptomethylquinuclidine or a salt thereof and a carbonyl compound in the presence of a catalyst made of at least one member selected from the group consisting of tin halides, oxyacids of phosphorus, phosphorus oxyhalides and organic sulfonic acids, to produce cis-form 2-methylspiro(1,3-oxathiolane-5,3')quinuclidine or a salt thereof.