TETRAHYDRO-.beta.-CARBOLINE DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF
CA 1254210 A · Owner: Tanabe Seiyaku Co. Ltd. · Inventors: Matsumoto, Mamoru; Iijima, Ikuo; Matsuoka, Yuzo
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Its claims, description and drawings are in the Canadian Patents Database.
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1-, Abstract of the Disclosure:, TETRAHYDRO-.beta.-CARBOLINE DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF Novel tetrahydro-.beta.-carboline derivatives of the formula:, wherein R1 is carboxyl, a lower alkoxycarbonyl carbamoyl, an N,N-di-lower alkylcarbamoyl an N-(phenyl-substituted, lower alkylidenamino)carbamoyl a N,N-di(lower alkyl)-, amino-lower alkyl or a nitrogen-containing monocyclic, heterocyclic group; R2 is hydrogen atom, a lower alkyl, or a hydroxy-lower alkyl group, or R2 is combined with R1 to form a group: -CO-O-CH2-;, R3 is hydrogen atom, a lower alkyl a phenyl-lower, alkyl, or a group: -CSS-R4; R4 is hydrogen atom, an alkyl, or a group: -(CH2)nY1; n is 1 or 2, Y1 is a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
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