Isomerization/recyclization of some 5-ethoxycarbonyl-pyrimidines
作者:R. S. Vardanyan、V. J. Hruby、G. G. Danagulyan、A. D. Mkrtchyan
DOI:10.1002/jhet.5570420413
日期:2005.5
This communication reports on the investigation of a new recyclization conversion of a pyrimidine ring, which can be referred to as CC recyclization. In this reaction the nucleophile cleaves the pyrimidine ring at the N(3)-C(4) bond, and following rotation around the single C(5)-C(6) bond the new cyclization takes place. This type of recyclization has general applicability, and takes place upon alkali
Synthesis of 4-(pyrazol-1-yl)pyrimidines from 4-hydrazinopyrimidines and investigation of their structure and some chemical properties
作者:Gevorg G. Danagulyan、Meline R. Arakelyan、Nicolai A. Aksenov、Henrik A. Panosyan、Armen G. Ayvazyan、Ani H. Hasratyan
DOI:10.1016/j.molstruc.2023.136676
日期:2024.1
exchange. The kinetics of H/D exchange was studied using some examples. It has been shown that the presence of an allyl group in the pyrimidine ring significantly affects the direction and rate of the H/D exchange. The structure of all synthesized substances was confirmed by NMR methods (1H, 13C, NOESY), հigh-resolution mass spectrometry and in some examples X-ray diffraction analysis was also performed
通过2-苄基-4-肼基嘧啶与β-二羰基化合物的乙氧基亚甲基衍生物反应,合成了相应的取代4-(1H-吡唑-1-基)嘧啶。在许多实例中,分离出中间体——试剂在乙醇中缩合的产物,表明对肼片段的氮原子的最初攻击涉及乙氧基亚甲基。注意到随后中间体在乙酸中的环化产生 4-(1 H-吡唑-1-基)嘧啶。对合成的非稠合双环体系进行烷基化,证明嘧啶环的氮原子N-1发生烷基化。合成了2-苄基-4-(5'-甲基-4'-乙氧基羰基吡唑-1'-基)-6-甲基嘧啶与氯化铜(II)的络合物。X射线衍射分析证明,与类似吡唑基嘧啶的金属配合物相比,在这种情况下,形成了具有配体:金属2/1的线性结构的单齿配合物,并且氮原子N嘧啶环的-1参与与金属原子成键以及烷基化过程。发现CD 3 ONa溶液中的吡唑基嘧啶分子发生H/D交换。外径。利用1 H NMR谱和高分辨率质谱的方法,证明了所研究的体系中烷基的氢原子发生了同位素交换。使用一些例子研究了
Synthesis and mass spectroscopic investigation of some 6-(pyrazol-1-Yl)pyrimidines
作者:G. G. Danagulyan、L. G. Saakyan、M. G. Zalinyan、P. B. Terent'ev
DOI:10.1007/bf02291802
日期:1997.6
Unusual dimroth rearrangement of an allyl-1,2,4-triazolo[4,3-c]pyrimidine
作者:G. G. Danagulyan、L. G. Saakyan、G. A. Panosyan、G. A. Bulakhov、P. B. Terent'ev、M. G. Zalinyan
DOI:10.1007/bf00532035
日期:1993.11
Synthesis of fused systems containing an angular nitrogen atom from substituted 2-benzyl-4-hydrazinopyridimines