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Volumn 45, Issue 47, 2004, Pages 8753-8756

Microwave assisted syntheses of 2,5-disubstituted 1,3,4-oxadiazoles

Author keywords

1,3,4 Oxadiazoles; Microwave irradiation; Oxidation; Solid support

Indexed keywords

1,3,4 OXADIAZOLE DERIVATIVE; ACETONE; PERMANGANATE POTASSIUM; WATER;

EID: 7044245919     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2004.09.095     Document Type: Article
Times cited : (104)

References (51)
  • 23
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    • (1984) Chem. Abstr. , vol.101
  • 35
    • 7044221638 scopus 로고    scopus 로고
    • note
    • Microwave irradiation was carried out using a commercial Moulinex AET 5 microwave oven
  • 36
    • 7044264051 scopus 로고    scopus 로고
    • note
    • 4 and evaporated in vacuo. The precipitated solids were crystallized from ethanol
  • 37
    • 7044234343 scopus 로고    scopus 로고
    • note
    • (b) General procedure for the synthesis of 1-aroyl-2-arylidene hydrazines in ethanol: a mixture of the acid hydrazide (6 mmol) and aldehyde (6 mmol) was dissolved in ethanol (25 mL). Then, three drops of phosphoric acid was added and the mixture placed in a Teflon vessel. The mixture was then subjected to microwave irradiation at 150 W. After complete conversion as indicated by TLC, the reaction mixture was cooled and the precipitated solids were filtered off. All the products were then recrystallized from ethanol
  • 38
    • 7044232746 scopus 로고    scopus 로고
    • note
    • All the 1,3,4-oxadiazoles prepared are known compounds and were characterized by comparison of their spectral and physical data with those of known samples
  • 39
    • 7044251471 scopus 로고    scopus 로고
    • note
    • (a) General procedure for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles (on the surface of silica gel): a mixture of 1-aroyl-2-arylidene hydrazines (3 mmol), potassium permanganate (15 mmol), and silica gel (10 g) was thoroughly ground in a mortar. The mixture was then subjected to microwave irradiation in an open Pyrex beaker for the appropriate time at 350 W (Table 2). After complete conversion as indicated by TLC, the mixture was extracted with chloroform and the products were identified by comparison with known samples. The same procedure was used in the case of other solid supports
  • 40
    • 7044260156 scopus 로고    scopus 로고
    • note
    • 4. The solvent was evaporated in vacuo and the precipitated solids were recrystallized directly from an appropriate solvent
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    • 85036487059 scopus 로고
    • Chem. Abstr. 54 1960 13108g
    • (1960) Chem. Abstr. , vol.54
  • 49
    • 7044224027 scopus 로고
    • Chem. Abstr. 58 1963 5663a
    • (1963) Chem. Abstr. , vol.58


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.