Aromatic ketone derivative intermediates for the preparation of antidepressant pyrido 1,4 benzodiazepines
CA 1262353 C · Owner: Lo, Young S. · Inventors: Lo, Young S.
Overview
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Disclosed are novel aromatic ketone derivatives of the formula:, (IIIb), (wherein Ar is pyridinyl thienyl, phenyl or substituted phenyl; Z is hydrogen, halogen, alkyl, alkoxy, hydroxy or nitro; alk1 is hydrocarbon chain; and, Q2 is -NR1R2 -N=CH-OC2H5 or tetrahydropyranyloxy;, R1 and R2 are each alkyl or CO2-alkyl or R1 and R2 together with the adjacent nitrogen atom form 1-piperidinyl, 1-phthalimido, 1-pyrrolidinyl 4-morpholino, 1-piperazinyl or 4-substituted 1-piperazinyl). The aromatic ketone derivatives are useful as intermediates for producing pyrido(1,4)benzodiazepines of the formula: (I), (wherein Ar and Z are as defined above; Y i hydrogen or substituent on the pyridine ring; and R …
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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.
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- Granted October 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 17, 2006.
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