Synthesis of -Nitro--diazocarbonyl Derivatives and Their Applications in the Cyclopropanation of Alkenes and in OH Insertion Reactions
作者:André B. Charette、Ryan P. Wurz、Thierry Ollevier
DOI:10.1002/hlca.200290023
日期:2002.12
a diazo-transfer reaction involving (trifluoromethyl)sulfonyl azide has been developed. These substrates undergo a rhodium-catalyzedcyclopropanation reaction with a variety of alkenes. A systematic study of the reaction indicated that the diastereoselectivity of the cyclopropanation could be effectively controlled through the modification of the steric bulk of the diazo reagent. A novel OH insertion
Synthesis and 1,3-dipolar cycloaddition reactions of 4-methyl-1-nitromethyl-2,6,7-trioxabicyclo[2.2.2]octane
作者:Christopher J Fenk
DOI:10.1016/s0040-4039(99)01656-1
日期:1999.11
The preparation of novel 3-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octyl)-Δ2-isoxazolines 2 via nitrile oxide cycloaddition chemistry is described. The target compounds were produced in moderate to good yields using only 2.2 equivalents of alkene and without the need for slow addition of reagents. Cycloaddition reactions were conducted using modified Mukaiyama conditions that included a convenient dehydration