Singletoxygen oxidation of dialkyl thioketones yields the corresponding ketones and in some cases sulfoxides in varying amounts. Steric considerations on the reactive zwitterionic/diradical intermediates have been invoked to rationalise the product distribution.
Carbonium Ions. XIV. The Opening of Bicyclic Alcohols to Cyclohexenyl Cations and the Further Conversion to Cyclopentenyl Cations
作者:N. C. Deno、John J. Houser
DOI:10.1021/ja01063a016
日期:1964.5.5
Generation and reactivity of allylic and benzylic samarium compounds using diiodosamarium in tetrahydropyran
作者:Béatrice Hamann-Gaudinet、Jean-Louis Namy、Henri B. Kagan
DOI:10.1016/s0040-4039(97)01506-2
日期:1997.9
Diiodosamarium prepared in THP reduces allylic iodides and bromides at 0 or -15 degrees C to give organosamarium compounds which are stable under these conditions. These allylic samarium compounds react with many functionalities including the keto group of keto esters. Benzylic samarium compounds were prepared similarly from benzylic bromides. (C) 1997 Elsevier Science Ltd.