Intermolecular Aminoallylation of Alkenes Using Allyl-Oxyphthalimide Derivatives: A Case Study in Radical Polarity Effects
作者:Samuel W. Lardy、Valerie A. Schmidt
DOI:10.1002/ejoc.201901071
日期:2019.10.31
This work describes the essential radicalpolarityeffects manifested in pursuit of a group transfer radical addition to achieve alkeneaminoallylation. Each open shell intermediate along the proposed mechanistic pathway is steered to preferentially react with only one reagent.
C-H Bond Functionalization with the Formation of a C-C Bond: A Free Radical Condensation Reaction Based on the Phthalimido-<i>N</i>-oxyl Radical
作者:Shradha Patil、Liang Chen、James M. Tanko
DOI:10.1002/ejoc.201301530
日期:2014.1
The development of a new chemical process that effects the conversion RH + C=C–C–X → R–C–C=C + HX, in which X is the phthalimido-N-oxyl radical (PINO·), is reported. The reaction yields are high, mass balances are excellent, and C–H bond functionalization and C–C bond formation are achieved in a single transformation. The byproduct of the reaction, N-hydroxyphthalimide, precipitates from solution and
Acid-catalyzed C–O coupling of styrenes with N-hydroxyphthalimide: trapping alkenyl radicals by TEMPO
作者:Xiao-Feng Xia、Su-Li Zhu、Yan-Ning Niu、Danting Zhang、Xiang Liu、Haijun Wang
DOI:10.1016/j.tet.2016.04.028
日期:2016.6
A mild metal-free acid-catalyzed 1,2-dihydroxylaminations of alkenes with N-hydroxyphthalimide and 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) has been demonstrated under air conditions to furnish the dioxygenated products in good to excellent yields. The dioxygenated product can be easily transformed into ketone derivative using 3-chloroperbenzoic acid (m-CPBA) as the oxidant in a high yield.
Organocatalytic Radical Involved Oxidative Cross-Coupling of<i>N</i>-Hydroxyphthalimide with Benzylic and Allylic Hydrocarbons
作者:Longyang Dian、Sisi Wang、Daisy Zhang-Negrerie、Yunfei Du
DOI:10.1002/adsc.201500623
日期:2015.12.14
N-hydroxyphthalimide and various benzylic and allylic hydrocarbons was realized through an organocatalytic radical-mediated process involving C(sp3)O bond formation using tert-butyl hydroperoxide (t-BuOOH) as an oxidant and tetra-n-butylammonium iodide [(n-Bu]4NI] as a catalyst, during which the phthalimide N-oxyl (PINO) radical and benzylic and allylic radicals were generated in situ and underwent