Inverse electron demand Diels–Alder reactions with aminomethyl derivatives of 3-arylhydroxycoumarins
作者:Galyna P. Mrug、Kostyantyn M. Kondratyuk、Svitlana P. Bondarenko、Mykhaylo S. Frasinyuk
DOI:10.1007/s10593-016-1907-6
日期:2016.7
The reactivity of Mannich bases derived from 6- and 7-hydroxycoumarins was studied in inverse electron demand Diels–Alder reactions with enamines. The reactions were shown to proceed by a cycloaddition mechanism followed by transformation of hemiaminals and resulted in the formation of heterocyclic pyrano[2,3-a]xanthene, pyrano[2,3-b]xanthene, and pyrano[3,2-b]xanthene.
在逆电子需量Diels-Alder与烯胺的反应中,研究了由6和7-羟基香豆素衍生的Mannich碱的反应性。反应显示是通过环加成机理进行的,随后是半胱氨酸的转化,导致杂环吡喃并[2,3- a ]蒽,吡喃并[2,3- b ]并蒽和吡喃并[3,2- b]的形成。 x吨。