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:
Dec. 28, 1999
Filed:
Apr. 29, 1998
Takenobu Nishikawa, Kanagawa, JP;
Nobuo Seido, Kanagawa, JP;
Takasago International Corporation, Tokyo, JP;
Abstract
Disclosed is a process for economic, safe and simple production of a 2-phenyl-2-(2'-piperidinylidene)acetate derivative at a reduced number of steps in a high yield, which comprises allowing 2,3,4,5-Tetrahydro-6-methoxypyridine and a benzyl cyanide derivative represented by the following general formula (2): wherein R.sup.1 represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom or an amino group, to undergo condensation reaction in the presence of an organic base such as 1,8-diazabicyclo[5.4.0]-7-undecene or a transition metal complex as a catalyst to produce a 2-phenyl-2-(2'-piperidinylidene)acetonitrile derivative represented by the following general formula (4): ##STR1## wherein R.sup.1 is as defined above; and the wavy line indicates a geometrical isomer, and then reacting with an alcohol in the presence of hydrogen chloride.