作者:Ivan Damljanović、Mirjana Vukićević、Rastko D. Vukićević
DOI:10.1007/s00706-005-0427-3
日期:2006.3
The conversion of alicyclic and aliphatic carbonyl compounds as well as aromatic aldehydes into the corresponding oximes (up to quantitative yields) was achieved by simply grinding these reactants, hydroxylamine hydrochloride and sodium hydroxide without solvent. However, this procedure was unsuccessful in the case of aromatic ketones. In this case it was necessary to add silica gel as a catalyst.
Dioxime oxalates; new iminyl radical precursors for syntheses of N-heterocycles
作者:Fernando Portela-Cubillo、James Lymer、Eoin M. Scanlan、Jackie S. Scott、John C. Walton
DOI:10.1016/j.tet.2008.08.112
日期:2008.12
an atom-efficient way of generating iminylradicals. The process was most efficient for dioxime oxalates having aryl substituents attached to their CN bonds. The method was useful for EPR spectroscopic study of iminyl and iminoxyl radicals. Photolyses in toluene solution, of dioxime oxalates containing alkenyl acceptor groups, yielded unsaturated iminylradicals that ring closed to afford 3,4-dihydro-2H-pyrroles
A New Method for the Generation and Cyclization of Iminyl Radicals via the Hudson Reaction
作者:Xichen Lin、Didier Stien、Steven M. Weinreb
DOI:10.1021/ol990720e
日期:1999.8.1
[formula: see text] A mild new synthetic procedure has been developed for in situ generation and cyclization of iminylradicals onto pendant alkenes, followed by functionalization of the resulting carbon radical by one of a variety of trapping reagents. The key process in the method involves production of the iminylradical via treatment of an aldoxime or ketoxime with readily available 2,6-dimethylbenzenesulfinyl
The oxime rearrangement cyclization. Alkenyl, styryl and vinyl chloride terminators in the synthesis of Δ1-pyrrolines
作者:Robert E. Gawley、Enrico J. Termine
DOI:10.1016/s0040-4039(00)86816-1
日期:1982.1
Functionalized γ,δ-unsaturated oximes, constructed by regiospecific alkylation of appropriate oximes, may be rearranged and cyclized to Δ1-pyrrolines in good yield.
Generation and Capture of Iminyl Radicals from Ketoxime Xanthates
作者:Fabien Gagosz、Samir Z. Zard
DOI:10.1055/s-1999-2971
日期:1999.12
Irradiation of ketoxime O-(S-methyl xanthates) containing a γ,δ-double bond leads to a dihydropyrrole through cyclisation of an intermediate iminyl radical in a radical chain reaction. The last propagation step involves transfer of a dithiocarbonate group and various external radical traps can be incorporated into the medium, allowing access to a variety of substituted dihydropyrroles.