5-dihydro-1H-imidazol-3-iurn-2-yl)-1,2-dihydro-1-phthalazin]-1,4-dialkoxy-1,4-dioxo-2-buten-2-olates 7 and 8. Enolic ester compounds underwent further transesterification reactions with formation of the betaines 9 and 10. The unequivocal structural assignement of these compounds was achieved by spectroscopic 1H and 13C nmr methods as well as X-ray analysis of 7.
1,2-二氢-2-(4,5-二氢
咪唑-2-基)
酞嗪-1-醇1与
乙炔二
羧酸二烷基酯放热反应,生成3- [2-(4,5-二氢-1 H-
咪唑-3-iurn -2-基)-1,2-二氢-1-
酞嗪] -1,4-二烷氧基-1,4-二氧代-
2-丁烯-2-酸酯7和8。烯醇酯化合物进行进一步的酯交换反应,形成
甜菜碱9和10。这些化合物的明确结构分配是通过1 H和13 C nmr光谱方法以及7的X射线分析实现的。