Palladium-catalyzed substitutions of allylic nitro compounds. Regiochemistry
作者:Rui Tamura、Yoshiki Kai、Masato Kakihana、Koji Hayashi、Masanori Tsuji、Tsunehiro Nakamura、Daihei Oda
DOI:10.1021/jo00373a008
日期:1986.11
Photoinduced radical reactions of α-alkylated ethyl 2-oxo-1-cyclopentanecarboxylate derivatives: α-cleavage and cyclization to the skeleton of linear cyclohexano diquinanes
作者:Nikolay T. Tzvetkov、Prashant A. Waske、Beate Neumann、Hans-Georg Stammler、Jochen Mattay
DOI:10.1016/j.tetlet.2007.12.089
日期:2008.3
The tricyclic core of linear cyclohexano diquinanes was synthesized using photoinduced electron transfer (PET) as a keystep. The reaction proceeded in high regioselective manner via ketyl radicalanions leading to distonic δ-keto radicalanion as reactive intermediates. The irradiation was carried out at a wavelength of 254 nm with triethylamine (TEA) as a strong reducing reagent in acetonitrile.