Treatment of ketones or aldehydes with selenium dioxide and diphenyl diselenide in the presence of acid catalyst afforded the corresponding α-phenylselenenyl carbonylcompounds in good yields.
Stereo- and Chemo-Selectivity in Reduction of<i>α</i>-[Phenyl(or Methyl)seleno]alkyl Aryl Ketones with Metal Hydrides
作者:Ikuo Aoki、Yoshiaki Nishibayashi、Sakae Uemura
DOI:10.1246/bcsj.68.337
日期:1995.1
Metalhydridereduction of a variety of α-[phenyl(or methyl)seleno]alkyl aryl ketones gives a mixture of threo- and erythro-β-aryl-β-hydroxyalkyl phenyl(or methyl)selenides by carbonyl reduction and 1-aryl-1-alkanol by the substitution of a phenyl(or methyl)seleno group with hydrogen. With all metalhydrides examined the formation of the threo-isomer always predominated. The addition of various metal
Organoselenium chemistry. Conversion of ketones to enones by selenoxide syn elimination
作者:Hans J. Reich、James M. Renga、Ieva L. Reich
DOI:10.1021/ja00852a019
日期:1975.9
of the selenoxide function. The many synthetic transformations originating from a,P-unsaturated carbonyl compounds have made their prep- aration a long standing important synthetic problem. The most straightforward method is the dehydrogenation of car- bonyl compounds. There are a number of methods for per- forming this the most important of which is the a-bromination-dehydrobromination method.' Orienta-
Alkyl phenyl selenoxides were produced in excellent yields by oxidation of the corresponding selenides with 2-nitro-benzenesulfonyl chloride and potassium superoxide in dry acetonitrile at -15 degrees C. (c) 2005 Elsevier Ltd. All rights reserved.