[Fe3O4@CQD@Si(OEt)(CH2)3NH@CC@Ad@SO3H]+Cl−: As a new, efficient, magnetically separable and reusable heterogeneous solid acid catalyst for the synthesis of 5-amino-1,3-diphenyl-1H-pyrazole 4-carbonitril and pyrano[2,3-c] pyrazole derivatives
the as-synthesized catalyst was evaluated in the synthesis of 5-amino-1, 3-diphenyl-1H-pyrazole 4-carbonitril and pyrano[2,3-c] pyrazole derivatives. The proposed method has important features which include solvent-free, mild, metal-free, high yield, shorter reaction time, easy recovery of catalyst and easy workup procedure. The effect of temperature and the amount of the catalyst (optimum reaction
合成了基于腺嘌呤的磁性纳米Fe 3 O 4,其表面具有高密度官能团SO 3H,因此它是一种新型的布朗斯台德酸纳米磁性催化剂,并作为固体多相催化剂。同样在该催化剂中,Fe3O4 纳米粒子的表面使用碳量子点 (CQD) 进行了保护。使用不同的技术对合成后的催化剂进行表征,包括傅里叶变换红外光谱 (FT-IR)、X 射线粉末衍射 (XRD)、场发射扫描电子显微镜 (FESEM)、透射电子显微镜 (TEM)、动态光散射(DLS)、能量色散 X 射线光谱 (EDX)、能量色散 X 射线光谱作图 (EDX mapping)、振动样品磁强计 (VSM)、热重分析 (TGA) 和差热分析 (DTA)。在 5-amino-1, 3-diphenyl-1 H的合成中评估了合成催化剂的活性-pyrazole 4-carbonitril 和 pyrano[2,3- c ] 吡唑衍生物。该方法具有无溶剂、温和、无金
Cyclization of 4,5-Diamino Pyrazole Derivatives and Their Antibacterial Activities
作者:Hala F. Rizk、Mahmoud A. EI-Badawi、Seham A. Ibrahim、Mohamed A. EI-Borai
DOI:10.1002/cjoc.201180265
日期:2011.7
yrazoles 4a–4c was reported. The different cyclization reactions were carried out with chalcone, 2‐mercaptoacetic acid and p‐anisialdehyde, ethyl chloroformate, glyoxal and thiourea to afford different N and S containing heterocycles. The reaction conditions were compared by conventional heating and microwave irradiation. The structures of the cyclization products were determined by analytical and