Untitled

9-[(2-Hydroxybenzylidene)amino]-11-(2-hydroxyphenyl)-10,13-diphenyl-8-oxa-12-azoniatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene acetate ethanol disolvate

“…For related compounds, see: Soldatenkov et al (2002Soldatenkov et al ( , 2010 Table 1 Hydrogen-bond geometry (Å , ). ketone, salicylic aldehyde and ammonium acetate as starting materials (Soldatenkov et al, 2010).…”

Synthesis of pyrrolidines and tetrahydro-1H-azepines from 4-aryl-1-benzoyl(ethoxycarbonyl)methyl-1-methyl-1,2,3,6-tetrahydropyridinium halides

“…In connection with our systematic investigation of the chemistry of 4-aryl-substituted tetrahydropyridines and related compounds [8,9] we decided to study the effect of an aryl substituent in the quaternary tetrahydropyridinium salts on the route of their reaction in the presence of base.…”

“…Exchange of the N-phenacyl fragment in the starting quaternary tetrahydropyridinium salts for N-(alkoxycarbonyl)methyl also stabilizes the intermediate ylides and leads to derivatives of the natural α-amino acid proline [3][4][5][6][7] which may be important from the viewpoint of biological activity. Key features in the studies [1-7] are as follows: firstly only C-unsubstituted tetrahydropyridines were used as the basic starting materials; secondly a high diastereoselectivity (95%) was found in the substituted pyrrolidines formed; and finally the basic electrophilic [2,3]-sigmatropic rearrangement was accompanied by up to 45% β-elimination with opening of the heterocycle and the formation of dialkylaminopenta-2,4-dienes.In connection with our systematic investigation of the chemistry of 4-aryl-substituted tetrahydropyridines and related compounds [8,9] we decided to study the effect of an aryl substituent in the quaternary tetrahydropyridinium salts on the route of their reaction in the presence of base. …”

Oxidation of heterocyclic compounds by manganese dioxide (Review)*

“…Arylpyridines 155 (yields 27-32%) were obtained during the condensation of 2-arylpropenes 152 with formaldehyde and ammonium chloride (probably through the intermediate piperidols 153 and tetrahydropyridines 154)[120].Ar CH 2 O, NH 4 Cl, MnO 2 , HCl + CH 2 O + NH 4 Cl + Ar = Ph, C 6 H 4 Ме-4…”