1994
DOI: 10.1007/bf01169954
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Synthesis of 5,6-polymethyleneselenopyryllium salts

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Cited by 5 publications
(4 citation statements)
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“…The reaction is carried out in DMF and it leads to mix tures of benzoylselenophenes and selenopyrans or ben zoylthiophenes and thiopyrans (Scheme 1). Scheme 1 X = Se (1, 3, 5); S (2,4,6) GC MS data indicate that the ratio of oxidized and reduced forms is 1:1. The product yield of this reaction in the case of 2,4,6 triphenylselenopyrylium perchlorate (1) is somewhat higher than in the case of 2,4,6 triphenyl thiopyrylium perchlorate (2).…”
Section: Resultsmentioning
confidence: 97%
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“…The reaction is carried out in DMF and it leads to mix tures of benzoylselenophenes and selenopyrans or ben zoylthiophenes and thiopyrans (Scheme 1). Scheme 1 X = Se (1, 3, 5); S (2,4,6) GC MS data indicate that the ratio of oxidized and reduced forms is 1:1. The product yield of this reaction in the case of 2,4,6 triphenylselenopyrylium perchlorate (1) is somewhat higher than in the case of 2,4,6 triphenyl thiopyrylium perchlorate (2).…”
Section: Resultsmentioning
confidence: 97%
“…The obtained oil was chromatographed on alumina (hexane-ether, 10 : 1) to give 2 benzoyl 3,5 diphenylthiophene (6). Yield 0.095 g (14%), m.p.…”
Section: Methodsmentioning
confidence: 99%
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“…Compound 8a (0.95 g, 2 mmol) was heated with either 57% HClO 4 (10 mL) at 70-90 °C for 1.5 h or refluxed in toluene with p-TsOH (0.52 g, 3 mmol) for 5 h. The mixture was cooled, and the crystals of pentadione derivative 11 was filtered off, washed with EtOH (3 × 10 mL) and recrystallized from hexanes; yield: 0.83 g (93%); mp 176-178°C (Lit. 16 mp 177-179°C).…”
Section: -[3-(4-methylphenyl)-15-diphenyl)-1h-pyrazol-4-yl]-1h-benzmentioning
confidence: 99%