A New Preparation of Aliphatic Nitro Compounds by S<sub>H</sub>2′ Reactions of<i>gem</i>-Halo Nitro Compounds with Allyltributylstannane
作者:Noboru Ono、Klaus Zinsmeister、Aritsune Kaji
DOI:10.1246/bcsj.58.1069
日期:1985.3
α-Nitroalkyl radicals generated from gem-halo nitro compounds are reactive enough to undergo the carbon–carbon bond forming reaction with allyltributylstannane via radical chain processes, which provides a new method for the introduction of an allyl group into nitroalkanes.
Various β-nitro ketones, including those bearing a β-tertiary carbon, were prepared from geminal bromonitroalkanes and trimethylsilyl enol ethers of a broad range of ketones by visiblelightphotoredoxcatalysis, which were then easily converted into β-amino ketones, 1,3-amino alcohols, α,β-unsaturated ketones, β-cyano ketones and γ-nitro ketones.
Thermal Decomposition of <i>meso</i>- and <i>d,l</i>-3,4-Diethyl-3,4-dimethyldiazetine <i>N,N</i>‘-Dioxide
作者:Gary W. Breton、Justine E. Nickerson、Anna M. Greene、Lindsey H. Oliver
DOI:10.1021/ol0710414
日期:2007.8.1
Two stereochemically defined diazetine N,N'-dioxides were synthesized. Thermal decomposition at 200 degrees C resulted in 95% retention of stereochemistry in the alkene product relative to the starting stereochemistry. These results suggest that decomposition occurs via cleavage of the two C-N bonds either simultaneously or in rapid succession.