Synthesis of acyclic and macrocyclic analogs of Di-, Tri-, and tetranucleotides
作者:V. E. Semenov、V. D. Akamsin、V. S. Reznik
DOI:10.1134/s1070363207080233
日期:2007.8
Compounds consisting of two or three uracil fragments were synthesized by reaction of methyl-substituted uracil sodium salts with 1-(6-bromohexyl)-3,6-dimethyluracil or 1,6-dibromohexane. Treatment of these compounds with paraformaldehyde gave the corresponding pyrimidinophanes and acyclic compounds in which the uracil fragments are linked through methylene bridges. Uracil derivatives having no substituent on N-3 were synthesized by reactions of silylated uracils with 1,3-bis(6-bromohexyl)uracil or 4,4'-(6-bromohexyloxy)diphenylmethane. The acyclic compound was converted into pyrimidinophane containing uracil fragments with (NH)-H-3 groups. A trinucleotide analog including uracil and two adenine fragments was synthesized from 1,3-bis(6-bromohexyl)uracil.
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