Electroinitiated oxygenation of alkenyl sulfides and alkynes in the presence of thiophenol
作者:Junichi Yoshida、Shogo Nakatani、Sachihiko Isoe
DOI:10.1021/jo00070a021
日期:1993.8
Electrolysis of alkenyl sulfides in the presence of thiophenol with bubbling of molecular oxygen gave the corresponding alpha-(phenylthio) carbonyl compounds with the consumption of a catalytic amount of electricity. An electroinitiated radical chain mechanism has been proposed. The reaction also took place without electrochemical initiation, but much (5-50 times) longer reaction time was required for the completion of the reaction. The potential utility of the present reaction in organic synthesis is demonstrated by the net 1,2-transposition of a phenylthio group and a carbonyl group. The electroinitiated oxygenation of ketene dithioacetals also proceeded smoothly to give the corresponding alpha-(phenylthio) thiol esters. It was also found that the electroinitiated oxygenation of alkynes in the presence of thiophenol gave alpha-(phenylthio) carbonyl compounds. A mechanism involving the initial formation of alkenyl sulfides has been proposed.
Oxygenation of alkenylsilanes in the presence of thiophenol. Direct and regiospecific conversion to .alpha.-phenylthio carbonyl compounds
作者:Junichi Yoshida、Shogo Nakatani、Sachihiko Isoe
DOI:10.1021/jo00285a007
日期:1989.11
YOSHIDA, JUN-ICHI;NAKATANI, SHOGO;ISOE, SACHIHIKO, J. ORG. CHEM., 54,(1989) N4, C. 5655-5657
Electro-initiated oxygenation of alkenylsilanes in the presence of thiophenol.
作者:Shogo Nakatani、Jun-ichi Yoshida、Sachihiko Isoe
DOI:10.1016/s0040-4020(01)86301-8
日期:1993.3
the reaction. Since various types of alkenylsilanes are prepared by the alkylation of 1-bromo-1-(trimethylsilyl)ethene, 1-bromo-1-(trimethylsilyl)ethene can be utilized as a synthon of phenylthioacetyl anion. The oxygenation of 1-phenylthio-1-(trimethylsilyl)alkenes in the presence of thiophenol gave α-phenylthio thiolesters indicating that the carbon-silicon bond was cleaved exclusively without affecting