• 제목/요약/키워드: Cannizzaro reaction

검색결과 2건 처리시간 0.019초

Cyclitol 유도체합성을 위한 Furfural 유도체의 반응에 관한 연구. Furfural, 5-Bromo-및 5-Methylfurfural의 Cannizzaro 반응 (Reaction of Furfural Derivatives. Cannizzaro reaction of Furfural, 5-Bromo-and 5-Methylfurfural)

  • 손주환;김용인;남기대
    • 대한화학회지
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    • 제16권5호
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    • pp.290-297
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    • 1972
  • 메탄올(95%) 용매내 $0{\sim}40^{\circ}C$에서 푸르푸랄, 5-메틸 및 5-브로모푸르푸랄의 알코올성 수산화칼륨에 의한 Cannizzaro 반응은 4차반응이며 푸르푸랄은 5-메틸푸르푸랄보다 3배, 5-브로모푸르푸랄은 푸르푸랄보다 10배 빠르게 진행된다. 그리고 이 반응에서 푸르푸랄, 5-메틸푸르푸랄, 5-브로모푸르푸랄의 활성화에너지는 각각 10.46 Kcal/mole, 16.27 Kcal/mole, 9.62 Kcal/mole이며 ${\Delta}H^{\neq}$${\Delta}S^{\neq}$를 계산한 바 5-브로모푸르푸랄, 푸르푸랄, 5-메틸푸르푸랄의 순으로 증가 되었다.

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Oxidation of Aromatic Aldehydes with Tetrabutylammonium Fluoride:Competition with the Cannizzaro Reaction

  • Chung, Kyoo-Hyun;Lee, Jae Hak;Chi, Dae Yoon;Moon, Byung-Chul;Lim, Choong Hwan;Kim, Jin Pil
    • Bulletin of the Korean Chemical Society
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    • 제27권8호
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    • pp.1203-1205
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    • 2006
  • During the synthesis of 4-fluorobenzaldehyde via the SNAr reaction of 4-nitrobenzaldehyde with TBAF, it was found that an equivalent amount of TBAF could oxidize benzaldehyde to benzoic acid. The reaction of 4-nitrobenzaldehyde with tetrabutylammonium fluoride (TBAF) gave 4-nitrobenzoic acid in high yield. Depending on the reaction conditions, other aromatic aldehydes produced acids with fewer amounts of alcohols. However, this type of oxidation has limited practical applications. Nevertheless, the mechanism is quite different from the Cannizzaro reaction because the amounts of the acid salt and alcohol formed were different.