A novel synthetic method of 2,4-disubstituted oxazoles using carboxylic acid-derived Bu2Sn[OC(O)R]2
摘要:
A novel synthetic method for the preparation of 2,4-disubstituted oxazoles was developed, entailing the reaction of dibutyltin diacylates Bu2Sn[OC(O)R](2) with 1-substituted acetylenes and TMSN3 to afford a range of 2,4-disubstituted oxazoles in good yields. (C) 2020 Elsevier Ltd. All rights reserved.
Diorganotin(IV)benzoates: Structure, stability and equilibrium analysis by 1H and 119Sn NMR spectroscopy in acid solution
作者:Juan Carlos Martínez García、Pedro Montes Tolentino、Irán F. Hernández Ahuactzi、Carolina Godoy Alcantar、Armando Ariza-Castolo、Jorge Antonio Guerrero Alvarez
DOI:10.1016/j.molstruc.2020.127915
日期:2020.6
elemental analysis IR spectroscopy, FAB+ and CI+ mass spectrometry, 1D and 2D13C and 119Sn NMR experiments and TGA. A linear relationship between the σHammett and 119Sn NMR chemical shift was found due to the electron-withdrawing and electron-donating groups. 1H and 119Sn NMR titration experiments with DCl were carried in CD3OD solution to estimate the stability of the complexes and study the equilibrium
In situ synthesis of dimeric distannoxane compounds using diorganotin bis(carboxylate) in basic solution
作者:Juan Carlos Martínez-García、Hugo Tlahuext、Carolina Godoy-Alcántar、Rosa Santillán、Antonio Rafael Tapia-Benavides、Armando Ariza-Castolo、Jorge Antonio Guerrero-Alvarez
DOI:10.1016/j.poly.2024.116919
日期:2024.5
synthesized using alkyl tin oxide (methyl, -butyl, and -octyl), and benzoic acid derivatives with substituents (NH, H, Cl, and NO). Comprehensive characterization through infrared (IR), mass spectrometry (MS), nuclear magnetic resonance (NMR), elemental analysis (EA), and X-ray diffraction confirmed their structures. The diorganotin bis(carboxylate) compounds were placed in situ in an NMR tube under basic
使用烷基氧化锡(甲基、正丁基和正辛基)和具有取代基(NH、H、Cl 和 NO)的苯甲酸衍生物合成了 12 种二有机锡双(羧酸酯)RSn(OCR')。通过红外(IR)、质谱(MS)、核磁共振(NMR)、元素分析(EA)和X射线衍射的综合表征证实了它们的结构。在碱性条件下,以氘代氯仿为溶剂,将二有机锡双(羧酸酯)化合物原位置于NMR管中,形成二聚二锡氧烷化合物([RSn(OCR')]O)。使用各种碱,例如哌啶、哌嗪、苯胺、吡啶、氢氧化钠和氢氧化四丁基铵。 NMR、MS 和 X 射线数据的整合为二聚二锡氧烷的形成及其在碱性条件下可能的反应机制提供了重要证据。