The ability of 2-ethoxybut-2-enal N,N-dimethylhydrazone to give with quinoline 5,8-diones or 1,4-naphtho-quinones, either a [4+2] cycloaddition in a neutral medium or a [3+2] process in the presence of trifluoroacetic acid is described. A 2D 1H-13C HMBC and 1D 1H NOE DIFF study is made in order to confirm the structures.
2-乙氧基丁-2-烯醛N,N-二甲基hydr与喹啉5,8-二酮或1,4-萘醌生成中性介质中[4 + 2]环加成或[3+]的能力[2]描述了在三氟乙酸存在下的方法。为了确定结构,进行了2D 1 H- 13 C HMBC和1D 1 H NOE DIFF研究。
Nebois Pascal, Cherkaoui Omar, Benameur Leila, Fillion Houda, Fenet Berna+, Tetrahedron, 50 (1994) N 28, S 8457-8464