Treatment of 2-methylene-1,3-dithiane 1-oxide with aryl iodides under palladium catalysis in the presence of potassium carbonate and tetrabutylammonium bromide leads to the Mizoroki–Heck arylation to yield 2-(arylmethylene)-1,3-dithiane 1-oxides in high yields.
Radicaladdition reaction of alkyl halides with ketene dithioacetal monoxide in the presence of tributyltin hydride and a catalytic amount of 2,2'-azobis(isobutyronitrile) (AIBN) proceeds smoothly to provide the corresponding adducts in moderate to high yields.
Tin-Hydride-Mediated Radical Addition of Alkyl Halides to 2-Methylene-1,3-dithiane Monoxide as a Ketene Equivalent
作者:Hideki Yorimitsu、Koichiro Oshima、Suguru Yoshida
DOI:10.3987/com-09-s(s)6
日期:——
Reductive radical addition of alkyl halides to ketene dithioacetal monoxide in the presence of tributyltin hydride and a radical initiator provides the corresponding adducts, 2-alkyl-1,3-dithiane monoxides, in good yields.
Biosynthetic studies of secondary plant metabolites with carbon-13 dioxide. Nicotiana alkaloids. 2. New synthesis of nornicotine and nicotine. Quantitative carbon-13 NMR spectroscopic analysis of [2',3',N-CH3-13C3]nicotine