112632-95-8Relevant articles and documents
Magnetic nanoparticle supported amine: An efficient and environmental benign catalyst for versatile Knoevenagel condensation under ultrasound irradiation
Ying, Anguo,Wang, Limin,Qiu, Fangli,Hu, Huanan,Yang, Jianguo
, p. 223 - 232 (2015/03/04)
Amine functionalized silica coated Fe3O4 nanoparticles (SiO2@MNP-A) were successfully prepared as a novel heterogeneous amine. The catalyst was characterized by XRD, FT-IR, TEM, magnetic measurement, elemental analysis and was found to be a magnetically separable and highly active catalyst for ambient Knoevenagel condensation of aromatic aldehydes and a-aromatic (heteroaromatic or polyaromatic)-substituted methylene compounds in water under ultrasonic irradiation to afford the corresponding products in good to excellent yields. Very interestingly, SiO2@MNP-A successfully catalyze the reaction of the non-cyano substituted compound with benzaldehyde to achieve a key intermediate for the preparation of Atorvastatin calcium in green and atom-economic manner. In addition, the catalyst SiO2@MNP-A can be reused for 8 times without any obvious loss of its activity. The role of ultrasonication in the Knoevenagel condensation was also discussed with the assistance of UV-vis spectrometry.
SYNTHESIS AND STRUCTURE ELUCIDATION OF BENZOTHIAZOLE-CONTAINING COMPOUNDS FOR ANTIMICROBIAL INVESTIGATION
Ghoneim, K. M.,El-Basil, S.,Osman, A. N.,Said, M. M.,Megahed, S. A.
, p. 1355 - 1362 (2007/10/03)
Attempted cycloaddition of benzimidazole-2-thiol with arylidenemalononitriles 1 was unsuccessful. 2-Cyanomethyl-1,3-benzothiazole 6 condensed with certain aromatic aldehydes to produce 7, cycloaddition of which with cyanoacethydrazide 3 yielded 8. Structu