Synthesis of Alkyl- and Aryl-Substituted Pyridines from (α,β-Unsaturated) Imines or Oximes and Carbonyl Compounds
作者:Robert J. Vijn、Henricus J. Arts、Richard Green、Anna M. Castelijns
DOI:10.1055/s-1994-25526
日期:——
Reaction of a variety of (α,β-unsaturated) imines or oximes with aliphatic aldehydes or cyclic ketones in the presence of a secondary amine afforded alkyl-, and/or aryl-, and/or cycloalkyl-substituted pyridines.1 To explain their formation, a hetero Diels-Alder reaction has been postulated, in which an 1-aza-1,3-butadiene reacts with an in situ generated enamine.
The invention relates to novel cyclopenteno[b]pyridine derivatives which have a group X on the 7-position and related tricyclic compounds. X is CONHR.sup.3, or CO.sub.2 R.sup.5 wherein R.sup.3 is hydrogen or lower alkyl and R.sup.5 is hydrogen or a lower alkyl or lower aralkyl group which may be substituted by alkyl, alkoxy, halogen, nitro or trifluoromethyl; other substituents may be present. The compounds are intermediates for compounds wherein X is CSNHR.sup.3 which are anti-ulcer agents.
Certain 5,6,7,8-tetrahydroquinoline-8-thiocarboxamides
申请人:John Wyeth & Brother Ltd.
公开号:US04085215A1
公开(公告)日:1978-04-18
The invention relates to novel pyridine derivatives which have a fused 5,6, or 7-membered saturated hydrocarbon ring adjacent to the nitrogen of the pyridine ring, and a group X situated on said hydrocarbon ring and separated by one carbon atom from the pyridine nitrogen atom, said group X is cyano, CONHR.sup.3, CSNHR.sup.3 or CO.sub.2 R.sup.5 wherein R.sup.3 is selected from hydrogen, lower alkyl and lower aralkyl radicals and R.sup.5 is selected from hydrogen, lower alkyl and lower aralkyl radicals which may be substituted by alkyl, alkoxy, halogen, nitro or trifluoromethyl; other substituents may be present. Compounds wherein X is CSNHR.sup.3 are anti-ulcer agents and the other compounds are intermediates therefor.
The invention relates to pharmaceutical compositions containing 5,6,7,8-tetrahydroquinoline-8-thioamides and nitriles and related tricyclic compounds and methods of treating ulcers using said compounds.
Selective synthesis of octahydroacridines and diannelated pyridines over zinc-containing mesoporous aluminosilicate molecular sieve catalysts
作者:Manickam Selvaraj、Mohammed A. Assiri
DOI:10.1039/c9dt01196j
日期:——
the highly selective synthesis of 1,2,3,4,5,6,7,8-octahydroacridine (OHA) by the vapour phase aminocyclization of cyclohexanone (CyO) with a mixture of formaldehyde (HCHO) and ammonia (NH3) over mesoporous bimetallic ZnAlMCM-41 (ZnAl-41) molecularsieves as efficient catalysts, which were synthesised by a simple basic hydrothermal method. To find optimum parameters for the synthesis of OHA, different