通过酰基(喹喔啉基)乙烯酮的环加成反应不同地合成(quinoxalin-2-yl)-1,3-恶嗪和嘧啶并[ 1,6 - a ] quinoxalines
摘要:
从酰基(喹喔啉基)乙烯酮与碳二亚胺的环加成反应,已经开发出一种简便的合成方法,可用于两种独特的基于喹喔啉的杂环骨架。所描述的反应代表了基于酰基(喹喔啉基)乙烯酮,根据酰基取代基的类型提供(喹喔啉-2-基)-1,3-恶嗪或嘧啶并[1,6- a ]喹喔啉的发散合成的第一个例子在烯酮中。关键反应物酰基(喹喔啉基)烯酮是通过容易获得的吡咯并喹喔啉氧代衍生物的热脱羰作用而原位生成的。所提出的面向多样性的合成提供了从廉价试剂中轻松获取骨架多样的药学上有趣的基于喹喔啉的杂环文库的途径。
Five-Membered 2,3-Dioxo Heterocycles: L. Synthesis and Thermolysis of 3-Aroyl- and 3-Hetaroyl-5-phenyl-1,2,4,5-tetrahydropyrrolo[1,2-a]quinoxalin-1,2,4-triones
Synthesis of pyrimido[1,6-<i>a</i>]quinoxalines via intermolecular trapping of thermally generated acyl(quinoxalin-2-yl)ketenes by Schiff bases
作者:Svetlana O Kasatkina、Ekaterina E Stepanova、Maksim V Dmitriev、Ivan G Mokrushin、Andrey N Maslivets
DOI:10.3762/bjoc.14.147
日期:——
Acyl(quinoxalin-2-yl)ketenes generated by thermal decarbonylation of 3-acylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones react regioselectively with Schiff bases under solvent-free conditions to form pyrimido[1,6-a]quinoxaline derivatives in good yields.
Synthesis of Pyrano[4′,3′:2,3]pyrrolo[1,2-a]quinoxalines by Reaction of Aroylpyrroloquinoxalines with Alkyl Vinyl Ethers
作者:S. O. Kasatkina、M. S. Titov、E. E. Stepanova、M. V. Dmitriev、A. N. Maslivets
DOI:10.1134/s1070428018040188
日期:2018.4
Thermally induced [4 + 2]-cycloaddition of 3-aroylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones with alkyl vinyl ethers afforded mixtures of diastereoisomeric (5S*,6aR*)- and (5R*,6aR*)-5-alkoxy-3-aryl-5,6-dihydropyrano[ 4′,3′: 2,3]pyrrolo[1,2-a]quinoxaline-1,2,7(8H)-triones.
3-芳基吡咯并[1,2- a ]喹喔啉-1,2,4(5 H)-三酮与烷基乙烯基醚的热诱导[4 + 2]-环加成反应得到非对映异构体(5 S *,6a R *)的混合物-和(5 R *,6a R *)-5-烷氧基-3-芳基-5,6-二氢吡喃并[4',3':2,3]吡咯并[1,2- a ]喹喔啉-1,2, 7(8 H)-三酮。
Reactions of 3-Aroylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones with 2,3-Dihydrofuran and 3,4-Dihydro-2H-pyran
作者:S. O. Kasatkina、E. E. Stepanova、M. V. Dmitriev、A. N. Maslivets
DOI:10.1134/s107042801807014x
日期:2018.7
3-Aroylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones reacted with 2,3-dihydrofuran and 3,4-dihydro-2H-pyran to give mixtures of the corresponding hetero-Diels-Alder (furo- and pyrano[3,2: 5,6]pyrano- [4,3: 2,3]pyrrolo[1,2-a]quinoxalines) and Michael adducts (furyl- and pyranylpyrrolo[1,2-a]quinoxalines).
Nucleophilic [3 + 3] addition of dimedone N-alkylimines to pyrrolo[1,2-a]quinoxaline-1,2,4-triones
作者:Ksenia S. Bozdyreva、Andrei N. Maslivets、Zainutdin G. Aliev
DOI:10.1070/mc2005v015n04abeh002138
日期:2005.1
1-Alkylamino-5,5-dimethyl-1-cyclohexen-3-ones react with pyrrolo[1,2-a]quinoxaline-1,2,4-triones to form substituted 3,10,13-triazapentacyclo[10.7.1.0(1,10).0(4,9).0(14,19)]icosa-4,6,8,14(19)-tetraene-2,11,18-triones.