Novel pyrimidine derivatives were prepared from the reaction of 2‐substituted 1,3‐bis(dimethylamino)‐trimethinium salts with thiourea or guanidine in the presence of ethyl‐diisopropylamine in ethanol at reflux, and also some 5‐substituted pyrimidine‐2‐thiols has been used for the synthesis of novel disulfane compounds. Infrared, 1H NMR, 13C NMR, and mass spectral data confirm the molecular structures
新型嘧啶衍生物是由2-取代的1,3-双(二甲基氨基)-三甲基亚锡盐与硫脲或胍在乙基二异丙胺存在下于乙醇中回流反应制得的,还有一些5-取代的嘧啶-2-硫醇已用于合成新型二硫醚化合物。红外,1 H NMR,13 C NMR和质谱数据证实了新合成化合物的分子结构。在DMSO中检测了这些化合物的紫外光谱行为和ƛ最大这些化合物进行了研究。
Synthesis of new malonaldehyde derivatives using 2-heteroaryl-substituted trimethinium salts
作者:A.M. Mehranpour、S. Hashemnia、F. Azamifar
DOI:10.1016/j.tetlet.2012.11.046
日期:2013.1
A synthetic route for obtaining 2-heteroaryl-substituted zwitterionic malonaldehydes 1c-6c is described. The synthesis involves the two-fold formylation of heteroarylacetic acids 1a-6a using the Vilsmeier-Haack reagent, followed by hydrolysis of the intermediate trimethinium salts 1b-6b with aqueous sodium carbonate. Elemental analysis, IR, H-1 NMR, C-13 NMR, and mass spectral data confirm the structures of the newly synthesized compounds. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and Characterization of New γ-Substituted Pentamethine Cyanine Dyes
作者:A. M. Mehranpour、S. Hashemnia、R. Maghamifar
DOI:10.1080/00397910903457290
日期:2010.11.16
Three novel pentamethine cyaninedyes with 3,5-dimethylpyridinium-1-yl and 4-benzylpyridinium-1-yl substituents in γ position of the methine chain were synthesized via a three-step procedure. The visible spectral behavior of these pentamethine cyaninedyes was examined in DMSO. Elemental analysis, IR, 1H-NMR, 13C-NMR, and Mass spectral data confirmed the molecular structure of the newly synthesized
study, an efficient method for the synthesis of new cyclophanes (5a-f, 6a-g) through the condensation of 1,4-phenylenedimethanamine (3) or 2,3,5,6-tetramethylbenzene-1,4-diamine (4) with 2-substituted vinamidiniums (2a-g) is described. The cyclophane derivatives are obtained in good to excellent yields in the presence of acetic acid in refluxing acetonitrile after 15 h. The structure of new compounds