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
Diastereoselective Bromocyclization of <i>O</i>-Allyl-<i>N</i>-tosyl-hydroxylamines
作者:Boris Egart、Dieter Lentz、Constantin Czekelius
DOI:10.1021/jo3026725
日期:2013.3.15
The intramolecular bromoamination of O-allyl-N-tosyl-hydroxylamines results in the formation of isoxazolidines via selective 5-endo-tet cyclization. This process occurs trans-selectively in high yield and diastereoselectivity. The obtained bromo-isoxazolidines provide access to other useful building blocks, such as 2-azido-aminoalcohols, diaminoalcohols, and aziridines.