作者:Carlo Dell'Erba、Angelo Mugnoli、Marino Novi、Manuela Pertici、Giovanni Petrillo、Cinzia Tavani
DOI:10.1002/(sici)1099-0690(199902)1999:2<431::aid-ejoc431>3.0.co;2-i
日期:1999.2
with diethylamine, and 2-substituted vinylmagnesium bromides gave good yields of the 4,5-dinitro-1,3,5,7-octatetraene derivatives 3a–e. With 1-phenylmagnesium bromide, conversely, only 3,4-dinitro-1,4-diphenyl-1,3,5-cyclooctatriene (4f) was obtained. From the unsubstituted dinitrooctatetraene 3a both the octatriene cycloisomer 4a and the valence tautomer of the latter (6a) could be isolated and characterized
1,4-双(二乙氨基)-2,3-二硝基-1,3-丁二烯 (2) 与 3,4-二硝基噻吩与二乙胺开环很容易得到 2-取代乙烯基溴化镁的反应4,5-二硝基-1,3,5,7-辛四烯衍生物 3a-e 的产率。相反,使用 1-苯基溴化镁,只能得到 3,4-二硝基-1,4-二苯基-1,3,5-环辛三烯 (4f)。从未取代的二硝基辛四烯 3a 中可以分离和表征辛三烯环异构体 4a 和后者的价互变异构体 (6a)。所得结果证明两个硝基对辛四烯体系的环异构化过程有不利影响。