An efficient synthesis of new pharmaceutically relevant dioxopyrrolidines, spirobenzo thiazine-2,3'chromans, and benzothiazepines via isocyanide-based multicomponent condensation reactions at room temperature is reported. This synthesis serves as a nice addition to group-assistant-purification (GAP) chemistry in which purification via chromatography and recrystallization can be avoided, and the pure products are obtained simply by washing the crude products with 95% ethanol. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis and Characterization of Immobilized Lipase on Fe3O4 Nanoparticles as Nano biocatalyst for the Synthesis of Benzothiazepine and Spirobenzothiazine Chroman Derivatives
作者:Robabeh Baharfar、Saadieh Mohajer
DOI:10.1007/s10562-016-1797-3
日期:2016.9
A retrievable nanostructure heterogeneous catalyst, based on lipase (lipase from the fungus Aspergillus niger), namely Fe3O4-bonded lipase (Fe3O4 NPs@ lipase) was prepared in nano size and fully characterized by several techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, Scanning electron microscopy, Transmission electron microscopy and Vibrating sample magnetometer. The