Indenyl and fluorenyl transition metal complexes. IV. Reactions of 2- and 4-azafluorenes with chromium hexacarbonyl

Reactions of 2- and 4-azafluorenes (I, II) and their methyl derivatives, 3-methyl-2-azafluorene (III) and 7-methyl-4-azafluorene (IV) with chromium hexacarbonyl in a 1 1 diglyme/heptane mixture at 140°C have been studied. A N-donor complex, C12H9NCr(CO)5 is formed in the reaction of I with Cr(CO)6. Compounds II-IV react to give arenechromiumtricarbonyl derivatives with benzene rather than pyridine ring bound to the metal. [η6-(4b,5,6,7,8,9b)-4-Azafluorene]chromiumtricarbonyl (VIII) gives the corresponding hydrochloride under the action of HCl. Methyl iodide decomposes VIII to produce 4-azafluorene iodomethylate. Deprotonation of VIII with BuLi in ether at -20°C followed by dilution with hexane leads to precipitation of the corresponding Li salt (Xb), having η6-structure. Methylation of Xb with methyl iodide proceeds stereospecifically to yield the exo-methyl derivative XII. Treatment of VIII with excess t-BuOK at 25°C in THF results in a mixture of η6-(Xa) and η5-anions (XI), the former predominating. © 1980.

Авторы
Thoma T. 1 , Pleshakov V.G. 1 , Prostakov N.S. 1 , Ustynyuk Yu.A.1 , Nesmeyanov A.N.2 , Ustynyuk N.A.2
Редакторы
-
Издательство
-
Номер выпуска
3
Язык
Английский
Страницы
359-365
Статус
Опубликовано
Подразделение
-
Номер
-
Том
192
Год
1980
Организации
  • 1 P. Lumumba People Friendship University, Ordzhonikidze 3, Moscow, 117302, Russian Federation
  • 2 Institute of Organo-Element Compounds, Academy of Sciences, the U.S.S.R., Vavilova St., 28, Moscow, 117813, Russian Federation
Ключевые слова
-
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/1530/