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http://earchive.tpu.ru/handle/11683/35535
Полная запись метаданных
Поле DC | Значение | Язык |
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dc.contributor.author | Goncharova, T. V. | en |
dc.contributor.author | Zatonskaya, L. V. | en |
dc.contributor.author | Potapov, Andrey Sergeevich | en |
dc.date.accessioned | 2016-12-16T03:20:56Z | - |
dc.date.available | 2016-12-16T03:20:56Z | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | Goncharova, T. V. Synthesis of di(Imdazolium) and di(Pyrazolium) Salts as Precursors for N-heterocyclic Dicarbene Complexes [Electronic resource] / T. V. Goncharova, L. V. Zatonskaya, A. S. Potapov // Procedia Chemistry . — 2014 . — Vol. 10 : Chemistry and Chemical Engineering in XXI century . — [P. 485-489] . | en |
dc.identifier.uri | http://earchive.tpu.ru/handle/11683/35535 | - |
dc.description.abstract | Alpha,omega-bis(pyrazol-1-yl)alkanes and alpha,omega-bis(imidazol-1-yl)alkanes with spacers consisting of four to ten methylene groups have been prepared from pyrazole, 3,5-dimethylpyrazole or imidazole and corresponding dibromoalkanes in a superbasic medium KOH-DMSO. The proposed method of synthesis allowed the preparation of new flexible bidentate ligands without the need to use toxic solvents and tedious workup procedures. Bis(pyrazol-1-yl)alkanes were further functionalized for their use as precursors for “non-classical” mesoionic N-heterocyclic carbene ligands. One the first step, iodine atoms were introduced to positions 4 of pyrazole rings by oxidative iodination using I[2]-HIO[3] system. On the next step, nitrogen atoms in positions 2 of pyrazole rings were alkylated using several agents. Reaction with methyliodide unexpectedly led to the formation of only mono-alkylated products even after 7 days of refluxing in a neat alkyliodide. Methylation by trimethyloxonium tetrafluoroborate or methyltriflate led to dimethylated products in high yields. Bis(imidazol-1-yl)alkanes were easily alkylated by methyliodide to give di(imidazolium) salts – precursors to “classic” N-heterocyclic dicarbenes. | en |
dc.language.iso | en | en |
dc.publisher | Elsevier | ru |
dc.relation.ispartof | Procedia Chemistry. Vol. 10 : Chemistry and Chemical Engineering in XXI century, 2014. | en |
dc.rights | info:eu-repo/semantics/openAccess | en |
dc.subject | пиразолы | ru |
dc.subject | имидазолы | ru |
dc.subject | соли | ru |
dc.subject | синтезы | ru |
dc.subject | прекурсоры | ru |
dc.subject | комплексы | ru |
dc.subject | pyrazole | ru |
dc.subject | imidazole | ru |
dc.subject | N-heterocyclic carbenes | ru |
dc.subject | imidazolium salts | ru |
dc.subject | pyrazolium salts | ru |
dc.title | Synthesis of di(Imdazolium) and di(Pyrazolium) Salts as Precursors for N-heterocyclic Dicarbene Complexes | en |
dc.type | Conference Paper | en |
dc.type | info:eu-repo/semantics/publishedVersion | en |
dc.type | info:eu-repo/semantics/conferencePaper | en |
dcterms.audience | Researches | en |
local.description.firstpage | 485 | - |
local.description.lastpage | 489 | - |
local.filepath | http://dx.doi.org/10.1016/j.proche.2014.10.081 | - |
local.identifier.bibrec | RU\TPU\network\4039 | - |
local.identifier.perskey | RU\TPU\pers\33909 | - |
local.localtype | Доклад | ru |
local.volume | 10 | - |
local.conference.name | Chemistry and Chemical Engineering in XXI century | - |
local.conference.date | 2014 | - |
dc.identifier.doi | 10.1016/j.proche.2014.10.081 | - |
Располагается в коллекциях: | Материалы конференций |
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Файл | Описание | Размер | Формат | |
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dx.doi.org-10.1016-j.proche.2014.10.081.pdf | 322,51 kB | Adobe PDF | Просмотреть/Открыть |
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