NaIO4-mediated sequential iodination/amidation reaction of N-alkyl quinolinium iodide salts has been first developed. This cascade process provides an efficient way to rapidly synthesize 3-iodo-N-alkyl quinolinones with high regioselectivity and good functional group tolerance. This protocol was also amenable to the isoquinolinium salts, thus providing a complementary method for preparing the 4-iodo-N-alkyl
Solvent-free 1H-tetrazole, 1,2,5,6-tetrahydronicotinonitrile and pyrazole synthesis using quinoline based ionic fluoride salts (QuFs): thermal and theoretical studies
作者:Nafees Iqbal、Jamshed Hashim、Syed Abid Ali、Mariya al-Rashida Mariya al-Rashida、Rima D. Alharthy、Shakeel Ahmad、Khalid Mohammed Khan、Fatima Zahra Basha、Syed Tarique Moin、Abdul Hameed
DOI:10.1039/c5ra16075h
日期:——
The role of ionic liquids as catalyst and solvent to mediate organic reactions is well documented.
离子液体作为催化剂和溶剂在促进有机反应中的作用已经有充分的文献记录。
Theoretical and experimental spectroscopic investigation of new polymethine donor-π-acceptor cyanine dyes: Synthesis, photophysical, and TDDFT studies
作者:Ahmed I. Koraiem、Ahmed El-Shafei、Islam M. Abdellah、Fathy F. Abdel-Latif、Reda M. Abd El-Aal
DOI:10.1016/j.molstruc.2018.07.021
日期:2018.12
Abstract Newseries of polymethine cyaninedyes with different length of π-chain have been synthesized and characterized. These newdyes are based on D-π-A architecture with long π-electron systems. The UV–vis/emission spectral studies showed that the dyes are absorbed in the region of λmax (485–570) nm and emitted at (540–600) nm. This makes these dyes favorable for the detection of biological and
Oxonium Salts in the Synthesis and Spectral Behavior of Pyrano(pyrylium)‐mono methine Cyanine Dyes
作者:Ahmed I. M. Koraiem、Hassan A. Shindy、Ragab M. Abu‐El‐Hamd、Ahmed M. A. Motaleb
DOI:10.1002/jhet.3453
日期:2019.6
Pyrano‐ and pyrylium mono‐8[4(1)] and/or 5(6)‐[2(4)]methine cyanine dyes (6a–k, 7a–f) were synthesized based on acyclic heterocyclic Schiff bases of pyrolo[3,2‐d]pyrazole[oxazole(imidazol‐6‐one)]‐1‐ium iodide salts, 5‐acetyl‐N‐aryl[pyrazolinyl(pyridinyl)]pyrolo‐[5,4‐d]pyrazolin‐iodide salts, and/or (anhydro bases) precursors (1a–i, 2a–I, 3a–i, 4a–i, and 5A,Ba–i). The structure of pyrylium‐9‐chloride
基于吡咯的无环杂环席夫碱合成了吡喃鎓和吡啶鎓单8 [4(1)]和/或5(6)[2(4)]次甲基花青染料(6a-k,7a-f)[ 3,2- [ d ]吡唑[恶唑(咪唑-6-6 )]-1-碘盐,5-乙酰基-N-芳基[吡唑啉基(吡啶基)]吡咯[5,4 - d ]吡唑啉碘盐和/或(无水碱)前体(1a–i,2a–I,3a–i,4a–i和5A,Ba–i)。通过元素和光谱数据鉴定了9氯化吡啶鎓和/或碘化物及其吡喃(pyrylium)-mono-8 [4(1)]和5(6)[2(4)]次甲基花青染料的结构。在95%乙醇,极性(非极性)有机溶剂和通用缓冲溶液中研究了某些选定染料的吸收光谱,以研究将此类染料用作光敏剂的最佳条件。
N‐bridgehead heterocyclic ylide as a privileged precursor in the design and skeletal diversity of heterocyclic Mono Methine and merocyanine dye motifs
作者:Ahmed I. M. Koraiem、Naglaa S. El‐Deen、Ragab M. Abu‐El‐Hamd
DOI:10.1002/jccs.201800309
日期:2019.10
N‐Bridge Head Heterocyclic Precursors (2a‐f, 3, 6a‐f & 13) were used as main key intermediates in the synthesis of N‐bridge head heterocyclic mono‐2(4)‐or 3 [4(1)] methine (4a‐h, 5a‐c, & 7a‐h), cyclic mero‐6(4)‐linkage position (8) cyanine dyes and bis‐3,6‐mono[4(2)]methine linkage positions (10, 11 & 12) & tri‐3(4)‐methine cyanine dye (14).The spectral behaviour, solvatochromic & acid‐base properties