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.
将 3-(2-硝基乙烯基)愈创木酚与甲基酸钠二聚后,得到 5-(1-愈创木酚基)-5,6-二氢-9-异丙基-1-甲基-4-硝基环戊并[ef]庚二烯(3)。经甲酸处理后,3 被定量转化为 9-异丙基-1-甲基-4-硝基环戊并[ef]庚烯。这些反应的结合为获得环戊并[ef]庚烯衍生物提供了一条便捷的途径。