Etude de la reaction chlorocarbene-acetals de cetenes
作者:N. Slougui、G. Rousseau
DOI:10.1016/s0040-4020(01)96366-5
日期:1985.1
The reaction of chloro, chloromethyl and chlorophenyl carbenoids with ketene alkylsilylacetals has been studied. Excellent yields of cyclopropanation were observed and the unstable chlorocyclopropanone acetals formed were thermallyrearranged in high yield into α-substituted α,β-ethylenic esters. This new method for the synthesis of unsaturated esters appeared complementary of the known-ones.
A mild catalytic system for radical conjugate addition of nitrogen heterocycles
作者:R. A. Aycock、H. Wang、N. T. Jui
DOI:10.1039/c7sc00243b
日期:——
The direct addition of pyridine and diazine units to electron-poor alkenes has been achieved via a redox radical mechanism that is enabled by limiting the effective concentration of the hydrogen-atom source. The described method is tolerant of acidic functional groups and is generally applicable to the union of a wide range of Michael acceptors and 6-membered heterocyclic halides.
Mechanism of β-Silyl Diacyl Peroxide Decomposition: A Mild and Stereoselective Synthesis of β-Silyl Esters
作者:Douglas S. Masterson、Ned A. Porter
DOI:10.1021/jo049852y
日期:2004.5.1
studies were carried out on the formation and decomposition of β-silyl diacyl peroxides, showing that the decomposition pathway involves an ionic mechanism that is influenced by the presence of the β-silyl moiety. These studies exclude a free radicaldecomposition pathway as evidenced by the absence of chemicallyinduced dynamic nuclear polarization (CIDNP) during the reaction and a strong correlation of