Knoevenagel; Faber, Chemische Berichte, 1898, vol. 31, p. 2775
作者:Knoevenagel、Faber
DOI:——
日期:——
Knoevenagel, Chemische Berichte, 1894, vol. 27, p. 2341
作者:Knoevenagel
DOI:——
日期:——
Bredt, Privatmitteilung
作者:Bredt
DOI:——
日期:——
Synthesis of pyrazolo[3,4-c]isoquinoline and pyrazolo[3,4-b]pyridine derivatives from azomethines and CH-acidic compounds
作者:Lothar Hennig、Mario Alva-Astudillo、Reinhard Meusinger、Gerhard Mann
DOI:10.1007/bf00816412
日期:——
Donor substituted arylidene aminopyrazoles 1a-c and CH-acidic 1,3-dicarbonyl compounds 2a-e give in ethanol in an addition/cyclization reaction pyrazolo[3,4-c]isoquinolines 4a-i and pyrazolo[3,4-b]pyridine derivatives 5a, b, respectively. Using ethyl cyanoacetate as CH-acidic component, cinnamate 6 and the cyano substituted pyrazolo[3,4-b]pyridine 7 are formed.