Transformation of 2,2-dioxoisothiazolo[5,4,3-d,e]quinolines to pyrrolo[4,3,2-d,e]quinolin-2(1H)-ones
摘要:
The sulfonamide group in 1H-1-alkyl-8-X-2,2-dioxoisothiazolo[5,4,3-d,e]quinolines 2 undergoes substitution with cyanide anion giving after hydrolysis pyrrolo[4,3,2-d,e]quinolin-2(1H)-ones 3. (C) 2001 Elsevier Science Ltd. Ail rights reserved.
Synthesis of 1H-1-alkyl-8-X-2,2-dioxoisothiazolo[5,4,3-d,e]-quinolines via tandem cyclization of N-alkyl-N-(2-X-5-nitrophenyl)prop-2-enyl sulfonamides
摘要:
Tandem five- and six-membered ring closure reactions to afford tricyclic sultams from N-alkyl-N-(2-X-5-nitrophenyl) prop-2-enyl sulfonamides is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Heating of 2,2-dioxoisothiazolo[5,4,3-d,e]quinolines (available from 3-nitroanilines in a simple three-step synthesis) with an excess of bis-functionalized methylene CH acids in the presence of K2CO3 as a base afforded 1H-benzo[i,j][2,7]naphthyridines in good yields.
Conversion of 3-nitroanilines into tricyclic systems: 1H-1-alkyl-8-X-2,2-dioxoisothiazolo[5,4,3-d,e]quinolines
作者:Zbigniew Wróbel
DOI:10.1016/s0040-4020(01)00738-4
日期:2001.9
The route leading to the tricyclic 2,2-dioxoisothiazolo[5,4,3-d,e]quinolines from 3-nitroanilines has been described. The scope and limitation factors as well as some mechanistic features are discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of 1H-1-alkyl-8-X-2,2-dioxoisothiazolo[5,4,3-d,e]-quinolines via tandem cyclization of N-alkyl-N-(2-X-5-nitrophenyl)prop-2-enyl sulfonamides
作者:Zbigniew Wróbel
DOI:10.1016/s0040-4039(00)01035-2
日期:2000.9
Tandem five- and six-membered ring closure reactions to afford tricyclic sultams from N-alkyl-N-(2-X-5-nitrophenyl) prop-2-enyl sulfonamides is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Transformation of 2,2-dioxoisothiazolo[5,4,3-d,e]quinolines to pyrrolo[4,3,2-d,e]quinolin-2(1H)-ones
作者:Zbigniew Wróbel
DOI:10.1016/s0040-4039(01)01024-3
日期:2001.8
The sulfonamide group in 1H-1-alkyl-8-X-2,2-dioxoisothiazolo[5,4,3-d,e]quinolines 2 undergoes substitution with cyanide anion giving after hydrolysis pyrrolo[4,3,2-d,e]quinolin-2(1H)-ones 3. (C) 2001 Elsevier Science Ltd. Ail rights reserved.