Triuracils – 1,3-Bis[ω-(N-methyluracil-1-yl)alkyl]thymines and Their 5,5′-Cyclic Counterparts
作者:Vyacheslav E. Semenov、Leisan F. Galiullina、Olga A. Lodochnikova、Olga N. Kataeva、Aidar T. Gubaidullin、Alla V. Chernova、Yurij Y. Efremov、Shamil K. Latypov、Vladimir S. Reznik
DOI:10.1002/ejoc.200700162
日期:2007.9
A series of acyclic compounds with two 3,6-dimethyluracil or 3-methyluracil units attached to a a thymine or isocyanurate fragment by polymethylene or xylylene spacers are investigated. Ring-closure reactions with paraformaldehyde in aqueous HCl in the presence of copper(I) chloride afforded pyrimidinophanes which can be considered macrocyclic counterparts of the acyclic triuracils. By X-ray diffraction