Fragmentation-cyclization reactions by photoinduced electron transfer
作者:Thorsten Kirschberg、Jochen Mattay
DOI:10.1016/0040-4039(94)85364-9
日期:1994.9
Irradiation of unsaturated bicyclo[4.1.0]heptanones and bicyclo[3.1.0]hexanones under reductive PET conditions leads to a regioselective cleavage of the cyclopropane moiety followed by cyclization. By this method various types of ring anellated and spirocyclic compounds are accessible.
Kirschberg Thorsten, Mattay Jochen, Tetrahedron Lett, 35 (1994) N 39, S 7217-7220
作者:Kirschberg Thorsten, Mattay Jochen
DOI:——
日期:——
Opening of cyclopropyl ketones with SmI2. Synthesis of spirocyclic and bicyclic ketones by intramolecular trapping of an electrophile
作者:Gary A. Molander、Cristina Alonso-Alija
DOI:10.1016/s0040-4020(97)00499-7
日期:1997.6
A method for the opening of cyclopropyl ketones with samarium(II) iodide followed by the intramolecular trapping of an electrophile is described. This process leads to the obtainment of functionalized spirocyclic, bicyclic, and tricyclic ketones in moderate to good yields.
Photoinduced Electron Transfer Reactions of α-Cyclopropyl- and α-Epoxy Ketones. Tandem Fragmentation−Cyclization to Bi-, Tri-, and Spirocyclic Ketones
作者:Thorsten Kirschberg、Jochen Mattay
DOI:10.1021/jo961015b
日期:1996.1.1
compounds, among them are silylated fragmentation products, indicating that a proton is transferred from not only the amine radical cation but also the cationic silyl group. The intramolecular Paternó-Büchi reaction has also been studied for cyclopropane derivatives of the jasmone type leading to tetracyclic oxetanes. Finally, alpha-epoxy-substituted ketones have been investigated under PET conditions, yielding