Synthesen mit Nitrilen, 88. Mitt.: Spiro[indol- und Spiro[inden-pyrano[2,3-c]pyrazole]aus Cyanmethylenderivaten und Pyrazolonen
摘要:
The reactivity of cyanomethylene-indolones (1 a-e) and 2-(dicyanomethylene)-indan-1,3-dione (4) towards, 1,5-disubstituted 3-pyrazolones (2 a-c) was investigated. The reactions yield spiro[indene- and spiro[indole-4'- and 6'-pyrano[2,3-c]pyrazoles] (3 a-e, 5 a-c). The structures are proven by C-13-NMR-spectroscopy. The mechanisms of the reactions are discussed.
Synthesen mit Nitrilen, 88. Mitt.: Spiro[indol- und Spiro[inden-pyrano[2,3-c]pyrazole]aus Cyanmethylenderivaten und Pyrazolonen
作者:Renate Dworczak
DOI:10.1007/bf00811473
日期:——
The reactivity of cyanomethylene-indolones (1 a-e) and 2-(dicyanomethylene)-indan-1,3-dione (4) towards, 1,5-disubstituted 3-pyrazolones (2 a-c) was investigated. The reactions yield spiro[indene- and spiro[indole-4'- and 6'-pyrano[2,3-c]pyrazoles] (3 a-e, 5 a-c). The structures are proven by C-13-NMR-spectroscopy. The mechanisms of the reactions are discussed.