Ring Opening of 5-(Bromomethyl)-2-Isoxazolines with Magnesium Metal in Absolute MeOH
摘要:
Ring opening of 5-(bromomethyl)- and 5-(phenylsulfonylmethyl)-2-isoxazolines with magnesium in absolute methanol at -23 degrees C and room temperature afforded regiospecifically beta,gamma-enoximes and (E)-alpha,beta-enoximes, respectively.
A practical and safe reduction methodology for the conversion of Î2-isoxazolines to 1,3-aminols is developed using polymethylhydrosiloxane-Pd(OH)2/C. In presence of (Boc)2O, the isoxazoline was converted into N-Boc protected 1,3-aminol in a one-pot procedure.
作者:Michael D. Mosher、Amber L. Norman、Khriesto A. Shurrush
DOI:10.1016/j.tetlet.2009.07.106
日期:2009.10
The preparation of substituted 4,5-dihydroisoxazoles can be accomplished via the treatment of beta,gamma-unsaturatecl oximes with liquid bromine. The reaction provides a convenient route to the highly functionalized title compounds. (C) 2009 Elsevier Ltd. All rights reserved.
General 5-Halomethyl Isoxazoline Synthesis Enabled by Copper-Catalyzed Oxyhalogenation of Alkenes
A general and efficient oxyhalogenation of unsaturated ketoximes has been achieved through copper catalysis with diethyl bromomalonate, N-chlorosuccinimide, and N-iodosuccinimide, yielding 5-chloromethyl, 5-bromomethyl, and 5-iodomethyl isoxazolines in good to excellent yields.
Ring Opening of 5-(Bromomethyl)-2-Isoxazolines with Magnesium Metal in Absolute MeOH
作者:Sung Jin Ha、Ge Hyeong Lee、In Kwon Yoon、Chwang Siek Pak
DOI:10.1080/00397919908085941
日期:1999.9
Ring opening of 5-(bromomethyl)- and 5-(phenylsulfonylmethyl)-2-isoxazolines with magnesium in absolute methanol at -23 degrees C and room temperature afforded regiospecifically beta,gamma-enoximes and (E)-alpha,beta-enoximes, respectively.