Unusual Closure of the Ten-Vertex Nido Cage via Alkylation: Regiospecific Synthesis of 3-Alkyl Derivatives of closo-1,2-C2B8H10

0488488 - ÚACH 2019 RIV US eng J - Článek v odborném periodiku
Bakardjiev, Mario - Štíbr, Bohumil - Tok, Oleg L. - Holub, Josef
Unusual Closure of the Ten-Vertex Nido Cage via Alkylation: Regiospecific Synthesis of 3-Alkyl Derivatives of closo-1,2-C2B8H10.
Inorganic Chemistry. Roč. 57, č. 3 (2018), s. 1368-1372. ISSN 0020-1669. E-ISSN 1520-510X
Grant CEP: GA ČR(CZ) GA16-01618S
Institucionální podpora: RVO:61388980
Klíčová slova: electrophilic halogenation * nido-5,6-c2b8h12 * carboranes * decaborane * boranes * 5,6-dicarba-nido-decaborane(12)
Obor OECD: Inorganic and nuclear chemistry
Impakt faktor: 4.850, rok: 2018

Alkylation of the [nido-5,6-(R2C2B8H9)-C-1](-) anions (where R-1 = H and Me) with alkyl halides (RX, where R = primary and secondary alkyls) in. boiling tetrahydrofuran (THF) proceeds via unusual H-2 elimination, followed by cage closure to give a series of the neutral closo-1,2-(R2C2B8H7)-C-1-3-R derivatives in similar to 70-80% yields. In contrast, treatment of the unsubstituted [nido-5,6-C2B8H11]- anion with tert-butyl bromide (t-BuBr) led to the formation of the parent closo-1,2-C2B8H10 in >85% yield. The constitution of all compounds isolated has been confirmed unambiguously by multinuclear (B-11, H-1, and C-13) nuclear magnetic resonance measurements and alpha-shift correlation assessments.
Trvalý link: http://hdl.handle.net/11104/0283075


Vědecká data: ACS publications