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Volumn 52, Issue 34, 2011, Pages 4412-4416

Solvent-free synthesis of functionalized pyridine derivatives using Wells-Dawson heteropolyacid as catalyst

Author keywords

3 Formylchromones; Functionalized pyridines; Multicomponent reaction; Solvent free organic synthesis; Wells Dawson heteropolyacid

Indexed keywords

AMMONIUM ACETATE; CHROMONE DERIVATIVE; ESTER DERIVATIVE; PYRIDINE DERIVATIVE;

EID: 79960834323     PISSN: 00404039     EISSN: 18733581     Source Type: Journal    
DOI: 10.1016/j.tetlet.2011.06.048     Document Type: Article
Times cited : (39)

References (30)
  • 23
    • 79960834828 scopus 로고    scopus 로고
    • note
    • 27,28 General Procedures for the preparation of substituted pyridines. The solid catalyst (1 mmol %) was added to a mixture of 3-formylchromones (1 mmol), alkyl or aryl acetylacetates (1 mmol) and ammonium acetate (1 mmol). The mixture was stirred at 80 °C for the indicated time (Table 1). The progress of the reaction was monitored by TLC. After completion of the reaction, hot toluene was added (2 × 2.5 mL) and the catalyst was filtered. The extracts were combined; their solvents were evaporated and then concentrated in vacuum. All the solid crude products were recrystallized.
  • 28
    • 79960846823 scopus 로고    scopus 로고
    • Recycling of catalyst. After reaction, the catalyst was washed with toluene (2 × 2 mL), dried under vacuum, and reused in the next catalytic cycle.
    • Recycling of catalyst. After reaction, the catalyst was washed with toluene (2 × 2 mL), dried under vacuum, and reused in the next catalytic cycle.
  • 29
    • 79960847134 scopus 로고    scopus 로고
    • note
    • 3) δ 1.09 (t, J = 7 Hz, 3H), 4.20 (q, J = 7 Hz, 2H), 6.94 (dt, J = 8 and 2 Hz, 1H), 7.11(d, J = 8 Hz, 1H), 7.43-7.53 (m, 3H), 7.54-7.67 (m, 4H), 8.41 (d, J = 2 Hz, 1H), 9.04 (d, J = 2 Hz, 1H), 11.81 (s, 1H).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.