The Reaction of Azulene with Nitroethene. A New Route to 2-(1-Azulenyl)ethanamines
作者:Shinji Kurokawa、Arthur G. , Jr. Anderson
DOI:10.1246/bcsj.58.367
日期:1985.1
Azulene and guaiazulene react with nitroethene to form substitution products having 2-nitroethyl, 2,4-dinitrobutyl, or 2-nitroethenyl groups at the 1(3)-position in low yields. The presence of formic acid prevented the formation of the dinitrobutyl compound, and increased the yield of the 2-nitroethyl derivative. A reaction course leading to these products is proposed. Reduction of 1-(2-nitroethyl)azulene
Novel Dimerization of 3-(2-Nitroethenyl)guaiazulene. A Convenient Route to Cyclopenta[ef]heptalene
作者:Shinji Kurokawa
DOI:10.1246/cl.1993.1109
日期:1993.7
Dimerization of 3-(2-nitroethenyl)guaiazulene with sodium methylate gave 5-(1-guaiazulenyl)-5,6-dihydro-9-isopropyl-1-methyl-4-nitrocyclopenta[ef]heptalene (3). On treatment with formic acid, 3 was converted into 9-isopropyl-1-methyl-4-nitrocyclopenta[ef]heptalene quantitatively. A combination of the reactions provides a convenient route to the cyclopenta[ef]heptalene derivatives.