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Open-face alkylation of the 8-R-nido-7,8,9-C3B8H11 tricarbollides
Authors: Bakardjiev Mario | Holub Josef | Tok Oleg L. | Štíbr Bohumil | Hnyk Drahomír | Nekvinda Jan | Růžičková Zdeňka | Růžička Aleš
Year: 2016
Type of publication: článek v odborném periodiku
Name of source: Journal of Organometallic Chemistry
Publisher name: ELSEVIER SCIENCE SA
Place: LAUSANNE
Page from-to: 80-84
Titles:
Language Name Abstract Keywords
cze Open-face alkylace 8-R-nido-7,8,9-C3B8H11 trikarbolidů. Typové sloučeniny, mono a dimethyl derivát 8-R-nido-7,8,9-C3B8H10-10-Me a 8-R-nido-7,8,9-C3B8H9-10,11-Me-2 byly syntetizovány částečnou methylací z 8-R-nido-7,8,9-C3B8H11 trikarbolidů (R = Ph, p-tol a 2-naftyl (2-naph)) v přítomnosti NaH v THF. Pro popsání obecného charakteru zmíněné alkylační procedury byly analogickou reakcí z 8-Ph-nido7,8,9-C3B8H11 prekurzoru a allyl, resp. benzyl bromidu připraveny β-dialkyl sloučeniny 8-Ph-nido-7,8,9-C3B8H9-10,11-R-2(1) (kde R-1 = C3H5 (All) a CH2Ph). Takto získané produkty byly charakterizovány za využití multinukleární NMR spektroskopie (B-11, H-1 a C-13) a v případě karboranu 8-Ph-nido-7,8,9-C3B8H9-10,11-Me-2 byla jeho struktura determinováná za pomoci X-ray difrakčních metod. alkylace; karborany; NMR spektroskopie; trikarbaborany; trikarbolidy; X-ray difrakce
eng Open-face alkylation of the 8-R-nido-7,8,9-C3B8H11 tricarbollides Sequential methylation of the 8-R-nido-7,8,9-C3B8H11 tricarbollides (R = Ph, p-tol and 2-naphthyl (2-naph)) in the presence of NaH in THF proceeds on the open-face B(10,11) positions to generate mono and dimethyl derivatives, 8-R-nido-7,8,9-C3B8H10-10-Me and 8-R-nido-7,8,9-C3B8H9-10,11-Me-2. To demonstrate the general character of the alkylation procedure, B-dialkyl derivatives 8-Ph-nido-7,8,9-C3B8H9-10,11-R-2(1) (R-1 = C3H5 (All) and CH2Ph) were prepared via analogous alkylation of 8-Ph-nido7,8,9-C3B8H11 with allyl and benzyl bromides. The structures were substantiated by multinuclear (B-11, H-1 and C-13) NMR spectroscopy and that of 8-Ph-nido-7,8,9-C3B8H9-10,11-Me-2 was determined by an X-ray diffraction analysis. (C) 2016 Published by Elsevier B.V. Alkylation; Carboranes; NMR spectroscopy; Tricarbaboranes; Tricarbollides; X-ray diffraction

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