Synthesis of Functional Derivatives of Benzodifurazan {Benzo[1,2-c:3,4-c’]bis([1,2,5]oxadiazole)}

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We have found that BDP reacts with 1,3-dibromo-5,5-dimethylhydantoin in sulfuric acid to form 5-bromo-4,5-dihydrobenzo[1,2-c:3,4-c']bis([1, 2,5]oxadiazol)-4-ol, which upon treatment with a base (calcium hydroxide) turns into 1a,7b-dihydrooxireno[2',3':5,6]benzo[1,2-c:3,4-c ']bis([1,2,5]oxadiazole). The structure of the compound was established by X-ray diffraction. The resulting compound exhibits the usual properties of epoxides. Easily adds nucleophiles to form the corresponding alcohols, which, when treated with p-toluenesulfonyl chloride in the presence of tetrabutylammonium bromide and sodium hydroxide in benzene, give functional derivatives of BDF.

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作者简介

Vladimir Samsonov

Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of the RAS

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Email: Samson@nioch.nsc.ru
ORCID iD: 0000-0001-8517-9641
俄罗斯联邦, 9, Ac. Lavrentyev Ave., Novosibirsk, 630090

Yuri Gatilov

Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of the RAS

Email: Samson@nioch.nsc.ru
ORCID iD: 0000-0002-4128-7293
俄罗斯联邦, 9, Ac. Lavrentyev Ave., Novosibirsk, 630090

Arkady Bryzgalov

Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of the RAS

Email: Samson@nioch.nsc.ru
ORCID iD: 0000-0001-7514-5325
俄罗斯联邦, 9, Ac. Lavrentyev Ave., Novosibirsk, 630090

参考

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2. Fig. 1. Ergoline derivative modified with benzodifurane.

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3. Scheme 1

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4. Fig. 2. Molecular structure of compound 3 according to PCA data (50% thermal ellipsoids are shown).

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5. Scheme 2

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6. Scheme 3

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7. Scheme 4

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8. Scheme 5

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