The formation of azulene derivatives from 2H-cyclohepta[b]furan-2-one derivatives
作者:T. Nozoe、K. Takase、T. Nakazawa、S. Fukuda
DOI:10.1016/s0040-4020(01)97748-8
日期:——
ethoxide or t-butyl-amine, giving the corresponding 1,2,3-trisubstituted azulene derivatives, respectively. The structures of these azulene derivatives are determined on the basis of chemical evidence, and spectral data. Considering the structural correlation between the starting 2H-cyclohepta[b]furan-2-ones and the azulene derivatives obtained, a reasonable reaction course, involving the heptafulvene-type
3-乙氧基羰基-和3-乙酰基-2 H-环庚[ b ]呋喃-2-酮易于与丙二腈反应。氰基乙酰胺,氰基乙酸乙酯和丙二酸二乙酯,在乙醇钠或叔丁胺的存在下,分别得到相应的1,2,3-三取代的z并衍生物。这些a菁衍生物的结构是根据化学证据和光谱数据确定的。考虑到起始的2 H-环庚[ b ]呋喃-2-酮与所获得的氮杂环戊烯衍生物之间的结构相关性,提出了一种合理的反应过程,涉及七富烯型和二氢氮杂环戊烷型中间体,可用于从中形成氮杂环戊烯衍生物。 2 H-环庚基[ b]呋喃-2-酮。