Synthesis of functionalized polyhedral oligomeric silsesquioxane (POSS) macromers by microwave assisted 1,3-dipolar cycloaddition
作者:Maria A. Chiacchio、Luisa Borrello、Giovanna Di Pasquale、Antonino Pollicino、Francesco A. Bottino、Antonio Rescifina
DOI:10.1016/j.tet.2005.06.006
日期:2005.8
In this paper we report the first synthesis of isoxazolidine and isoxazoline-POSS macromers by 1,3-dipolar cycloaddition reactions of vinyl- and styryl-POSS with N-methyl-C-ethoxycarbonylnitrone and ethoxycarbonyl nitrile oxide, promoted by microwave irradiation. The nature of the resulting cycloadducts has been determined by NOE experiments and supported by computational studies at PM3 and DFT B3LYP/6-31G* levels. (c) 2005 Elsevier Ltd. All rights reserved.