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Volumn 6, Issue 5, 2009, Pages 381-383

Regioselective three-component synthesis of indolylpyrazolo[3, 4-b]pyridines induced by microwave and under solvent-free conditions

Author keywords

3 (1H indol 3 yl) 3 oxopropanenitrile; 5 Aminopyrazole; Benzaldehyde; Indolylpyrazolo 3, 4 b pyridine; Microwave; Solvent free procedure; Three component reaction

Indexed keywords


EID: 69549121971     PISSN: 15701786     EISSN: None     Source Type: Journal    
DOI: 10.2174/157017809788681284     Document Type: Article
Times cited : (19)

References (27)
  • 19
    • 0014278027 scopus 로고
    • and references cited therein
    • Orth, R. E. J. Pharm. Sci., 1968, 57, 537-556 and references cited therein.
    • (1968) J. Pharm. Sci. , vol.57 , pp. 537-556
    • Orth, R.E.1
  • 25
    • 85036839968 scopus 로고    scopus 로고
    • General procedure for the preparation of 1-(1H-indol-3-yl)-3-aryl-2- cyano-1-propenone 6 under microwave irradiation. Microwave experiment was carried out using a focused microwave reactor (CEM Discover TM). The 3-(1H-indol-3-yl)-3-oxopropanenitrile 5 (0.5 mmol) was mixed with equimolar amounts of aromatic aldehydes 2 (0.5 mmol). The mixture was exposed to microwave radiation at a 200 C with a maximum power of 300 W for 6 min. The solid was dissolved in hot ethanol-DMF solution (2: 1)
    • 4 calcd 362.1267, found 362.1263.
  • 26
    • 85036841917 scopus 로고    scopus 로고
    • General procedure for the preparation of 6-(1H-indol-3-yl)-3-methyl-1- phenyl-4-aryl-1H-pyrazolo[3, 4-b]pyridine-5-carbonitrile 7 under microwave irradiation. Microwave experiment was carried out a focused microwave reactor (CEM Discover TM). Method A. The 5-aminopyrazole 1 and 1-(1H-indol-3-yl)-3-aryl- 2-cyano-1-propenone 6 was exposed to microwave radiation at 200 °C with a maximum power of 300 W for 9 min. The reaction mixture was dissolved in hot ethanol-DMF solution (2: 1) and solid product was filtrated and washed with ethanol and diethyl ether to afford the pure products 6 in lower yields than 35%. Method B
    • 3 calcd 515.1957 found 515.1967.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.