Comparison of N-(3,4,5-trimethoxybenzylidene)naphthalen-1-amine and its reduction product N-(3,4,5-trimethoxybenzyl)naphthalen-1-amine

The authors thank the Centro de Instrumentación Científico-Técnica of the Universidad de Jaén and the staff for the data collection. AG and RA thank COLCIENCIAS and the Universidad del Valle for financial support. JC thanks the Consejería de Innovación, Ciencia y Empresa (Junta de Andalucía, Spain) and the Universidad de Jaén for financial support.The molecules in (E)-N-(3,4,5-trimethoxybenzylidene)naphthalen-1-amine, C20H21NO3, (I), and its reduction product N-(3,4,5-trimethoxybenzyl)naphthalen-1-amine, C20H19NO3, (II), are both conformationally chiral, but (I) crystallizes in a centrosymmetric space group, while (II) crystallizes with just one conformational enantiomer in each crystal. A combination of two C - H⋯O hydrogen bonds links the molecules of (I) into sheets containing a single type of R66(44) ring, and these sheets are linked into a continuous three-dimensional array by a single π-π stacking interaction. The molecules of (II) are linked into complex sheets by a combination of N - H⋯O, C - H⋯O and C - H⋯π(arene) hydrogen bonds.Publisher PDFPeer reviewe

Octyl 1-(5-tert-butyl-1H-pyrazol-3-yl)-2-(4-chlorophenyl)-1H-benzimidazole- 5-carboxylate : complex sheets built from N-H⋯N, C-H⋯N and C-H⋯O hydrogen bonds

The authors thank the Centro de Instrumentacion Cientıfico-Tecnica of the Universidad de Jaen and the staff for the data collection. Financial support from COLCIENCIAS, the Universidad del Valle, the Consejerıa de Economıa, Innovacion, Ciencia y Empleo (Junta de Andalucıa, Spain) and the Universidad de Jaen is gratefully acknowledged.In the title compound, C29H35ClN4O2, the bond lengths provide evidence for aromatic delocalization in the pyrazole ring but bond fixation in the fused imidazole ring, and the octyl chain is folded, rather than adopting an all-trans chain-extended conformation. A combination of N-H⋯N, C-H⋯N and C-H⋯O hydrogen bonds links the molecules into sheets, in which the hydrogen bonds occupy the central layer with the tert-butyl and octyl groups arranged on either side, such that the closest contacts between adjacent sheets involve only the octyl groups. Comparisons are made with the supramolecular assembly in some simpler analogues.Publisher PDFPeer reviewe

Formación de compuestos heterocíclicos, bicíclicos y tricíclicos a partir de la reacción de o-diaminas y tetraminas con cetonas aromáticas

IP 1106-05-136-9