Oxidation of Olefins into α-Phenylseleno Carbonyl Compounds. Highly Regioselective<i>anti</i>-Markownikoff Type Oxidation of Allylic Alcohol Derivatives
作者:Makoto Shimizu、Ryo Takeda、Isao Kuwajima
DOI:10.1246/bcsj.54.3510
日期:1981.11
(C6H5Se)2–(C6H5SeO)2O system, oxoselenenylation reactions of C=C bonds have been examined with allylic and homoallylic alcohol derivatives, and substituted cyclohexenes, and allyl t-butyldimethylsilyl ethers are found to undergo regioselective conversion into β-siloxy α-phenylseleno carbonylcompounds in high yields.
Allylgermanes were obtained by the reaction of allyl acetates with bis(triethylgermyl)cuprate(I) reagent in high yields. It was found that the present reaction proceeded with high regioselectivity, in which a triethylgermyl group was exclusively introduced to the less substituted side of an allylic system regardless of the original location of acetoxyl group. In the case of the allyl acetates possessing two secondary centers at the both ends of the allylic system, the formal SN2 product was preferentially produced (SN2 : SN2′ = ca. 9 : 1). The desulfurizative germylation of allyl phenyl sulfides utilizing bis(triethylgermyl)cuprate(I) reagent also proceeded to give allylgermanes in good yields with the same regioselectivity.