New method for the synthesis of β-tropolones: Structures of condensation products of o-quinones with 2-methylquinolines and the mechanism of their formation
作者:V. I. Minkin、S. M. Aldoshin、V. N. Komissarov、I. V. Dorogan、Yu. A. Sayapin、V. V. Tkachev、A. G. Starikov
DOI:10.1007/s11172-006-0547-x
日期:2006.11
containing the tertiary amino group at position 4 with quinone 14 is accompanied by the formation of derivatives of a new heterocyclic system, viz., 4,6-dioxo-2-azabicyclo[3.3.0]octa-2,7-diene N-oxide. The molecular and crystal structures of two 5,7-di(tert-butyl)-3-hydroxy-2-(quinolin-2-yl)tropolones and two dioxoazabicyclooctadiene N-oxides, as well as of the preparatively isolated intermediate of the first
开发了一种基于 2-甲基喹啉衍生物与 3,5-二(叔丁基)-1,2-苯醌和 4,6-二(叔-丁基)-3-硝基-1,2-苯醌 (14)。通过量子化学方法 (DFT B3LYP/6-31G**) 研究了多步反应产生 β-tropolone 的机制及其互变异构现象。在 4 位含有叔氨基的 2-甲基喹啉衍生物与醌 14 的反应伴随着新杂环系统衍生物的形成,即 4,6-二氧代-2-氮杂双环 [3.3.0]octa- 2,7-二烯N-氧化物。两种 5,7-二(叔丁基)-3-羟基-2-(quinolin-2-yl)tropolones 和两种二氧氮杂双环辛二烯 N-氧化物的分子和晶体结构,