The X-ray structures of two geometric isomers of 5-(2-chlorobenzylidene)-creatinine (1) are reported. In the crystal of almost planar 1-(E) hydrogen bonded centrosymmetric dimmers dominate, while in the structure of 1-(Z), adopting the twisted conformation, helical chains motifs, subsequently intertwined in braids, are preferred. Both creatinine analogs were found to crystallize in the 2-amino tautomeric form. X-ray investigations have been supported with (1)H and (13)C NMR data that confirmed 2-amino form also in DMSO solutions of (E)- and (Z)-5-(2-chlorobenzylidene)-creatinine. (C) 2009 Elsevier B.V. All rights reserved.
Dry Condensation of Creatinine with Aldehydes Under Focused Microwave Irradiation
作者:Didier Villemin、Beno[icaron]t Martin
DOI:10.1080/00397919508015462
日期:1995.10
Abstract Creatinine was condensed with aromatic aldehydes into Z-arylidene creatinines without solvent under focused microwaveirradiation.