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
A three-component reaction of olefin, diselenide and water, alcohols, phenol, carboxylic acid, or amine by a commercially available hypervalent iodine(III) reagent, PhIO, was developed. This method provides access to a wide range of vicinally functionalized selenoderivatives under ambient conditions with mostly excellent yields and high diastereoselectivity. The developed reaction displays high levels