[EN] ALPHA-HYDROGEN SUBSTITUTED NITROXYLS AND DERIVATIVES THEREOF AS CATALYSTS<br/>[FR] NITROXYLES À SUBSTITUTION ALPHA-HYDROGÈNE ET LEURS DÉRIVÉS EN TANT QUE CATALYSEURS
申请人:TECHNION RES & DEV FOUNDATION
公开号:WO2013118118A1
公开(公告)日:2013-08-15
The present invention relates to novel alpha-hydrogen substituted nitroxyl compounds and their corresponding oxidized (oxoammonium cations) and reduced (hydroxylamine) forms, and to the use of such compounds, inter alia, for (1) oxidation of primary and secondary alcohols to aldehydes and ketones, respectively; (2) resolution of racemic alcohols; (3) desymmetrization of meso-alcohol; (4) as radicals and spin trapping reagents; and (5) as polymerization agents. The present invention further relates to processes for preparing the novel nitroxyl/oxoammonium/ hydroxylamine compounds from the corresponding amines, and to certain novel amine derivatives and their uses. The compounds of the invention as well as the amine precursors are also useful as ligands for transition metals and as organocatalysts in e.g., aldol reactions.
Alpha-Hydrogen Substituted Nitroxyls And Derivatives Thereof As Catalysts
申请人:Technion Research and Development Foundation Ltd.
公开号:US20140350258A1
公开(公告)日:2014-11-27
Novel alpha-hydrogen substituted nitroxyl compounds and their corresponding oxidized (oxoammonium cations) and reduced (hydroxylamine) forms, and the use of such compounds, inter alia, for oxidation of primary and secondary alcohols to aldehydes and ketones, respectively; resolution of racemic alcohols; desymmetrization of meso-alcohol; as radicals and spin trapping reagents; and as polymerization agents. Processes for preparing the novel nitroxyl/oxoammonium/hydroxylamine compounds from the corresponding amines, and certain novel amine derivatives and their uses. The compounds and amine precursors are useful as ligands for transition metals and as organocatalysts in e.g., aldol reactions.
US9475774B2
申请人:——
公开号:US9475774B2
公开(公告)日:2016-10-25
Synthesis and stability of cyclic α-hydrogen nitroxides
作者:Hila Toledo、Michal Amar、Sukanta Bar、Mark A. Iron、Natalia Fridman、Boris Tumanskii、Linda J. W. Shimon、Mark Botoshansky、Alex M. Szpilman
DOI:10.1039/c5ob01443c
日期:——
a unique place in science due to their stable radical nature. We have recently reported the first design concept providing a general solution to the problem of designing and preparing monocyclic α-hydrogen nitroxides. The initial studies were limited to aryl derivatives. We now report a wider study showing that alkyl substituents may be employed as well. In addition, we report several additional examples