Synthesis of nitro and amino derivatives of benzothiacrown ethersстатья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Synthesis of nitro and amino derivatives of benzothiacrown ethers / S. N. Dmitrieva, N. I. Sidorenko, A. I. Vedernikov et al. // Russian Chemical Bulletin. — 2007. — Vol. 56, no. 5. — P. 993–1002. The condensation reaction of 1,2-bis(2-haloethoxy)-4-nitrobenzenes with acyclic alpha,omega-(oxa)alkanedithiols in the presence of alkali metal carbonates produced a series of nitrobenzodithiacrown ethers with macrocycles of different size. The structures of three ethers were established by X-ray diffraction. A new method was developed for the synthesis of nitrobenzomonothia-15-crown-5 ether. Nitro derivatives of benzodithiacrown ethers were tested as reagents for extraction of palladium(II), platinum(IV), and rhodium(III) from hydrochloric acid solutions. Extraction of Pd-II salts was found to be highly selective compared to that of Pt-IV and Rh-III salts. Benzodithia-15-crown-5 ether is the most efficient extractant for palladium(II). Reduction of nitrobenzothiacrown ethers with hydrazine hydrate in the presence of a platinum catalyst afforded their amino derivatives. [ DOI ]

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