Formation of cyclopent[a]indene and acenaphthylene from allyl esters of biphenyl mono- and di-carboxylic acids and from biphenyl dicarboxylic anhydrides on flash vacuum pyrolysis at 1000-1100°C

被引:15
作者
Bapat, JB [1 ]
Brown, RFC [1 ]
Bulmer, GH [1 ]
Childs, T [1 ]
Coulston, KJ [1 ]
Eastwood, FW [1 ]
Taylor, DK [1 ]
机构
[1] Monash Univ, Dept Chem, Clayton, Vic 3168, Australia
基金
澳大利亚研究理事会;
关键词
D O I
10.1071/C97119
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Flash vacuum pyrolysis at 1000-1100 degrees C of the allyl esters of the three isomeric biphenylcarboxylic acids, of the allyl esters of the 12 biphenyldicarboxylic acids and of the three biphenyldicarboxylic anhydrides gave pyrolysates which were examined by H-1 n.m.r. spectroscopy at temperatures below -50 degrees C. In all cases the spectra showed the presence of cyclopent[a]indene and acenaphthylene together with other products. Possible mechanisms for these ring contraction and cyclization processes are discussed and the results of pyrolyses of [2,3-C-13(2)]biphenyl-2,3-dicarboxylic anhydride, and [3,4-C-13(2)]- and (2-H-2(1))-biphenyl-3,4-dicarboxylic anhydrides are reported.
引用
收藏
页码:1159 / 1182
页数:24
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