Studies on Seven-membered Ring Compounds. XX. Reactions of Troponeimine Derivatives. (2)
作者:Hideo Nakao、Nobuo Soma、Genshun Sunagawa
DOI:10.1248/cpb.13.828
日期:——
The reaction of 2-methoxytroponeimine (I) and its N-methyl derivative (II) with active methylene compounds were carried out. The reaction of I with malononitrile, ethyl cyanoacetate or cyanoacetamide in the presence of sodium ethoxide afforded rearrangemet products, that is 3-phenylacrylic acid derivatives. The same reaction in the absence of sodium ethoxide gave mainly 2-imino-1, 2-dihydrocyclohepta[b]pyrrole derivatives. However, the reaction of I with diethyl malonate afforded ethyl 2-oxo-8-methoxy-1, 2-dihydrocyclohepta[b]pyrrole-3-carboxylate. II showed some different reactivity from I. Namely, the reaction of II with active methylene compounds in the presence of sodium ethoxide afforded 2-imino-1, 2-dihydrocyclohepta[b]pyrrole derivatives besides rearrangement products.
2-甲氧基托品酮亚胺(I)及其N-甲基衍生物(II)与活性甲基酮化合物的反应进行了研究。I与丙二腈、氰乙酸乙酯或氰乙酰胺在乙醇钠存在下反应,得到了重排产物,即3-苯基丙烯酸衍生物。同样条件下,在无乙醇钠时主要生成2-亚胺基-1,2-二氢环庚[b]吡咯衍生物。然而,I与丙二酸二乙酯反应生成了乙酯2-氧代-8-甲氧基-1,2-二氢环庚[b]吡咯-3-羧酸酯。II显示出与I不同的反应活性,在乙醇钠存在下,II与活性甲基酮化合物的反应除了重排产物外,还主要生成2-亚胺基-1,2-二氢环庚[b]吡咯衍生物。