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Reactions at the B–B Bond of Bis(trisyl)oxadiborirane: Ring Extensions
Author(s) -
Biermann K.,
Paetzold P.
Publication year - 2001
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200110)627:10<2313::aid-zaac2313>3.0.co;2-n
Subject(s) - amide , chemistry , adduct , ring (chemistry) , hexane , medicinal chemistry , stoichiometry , stereochemistry , organic chemistry
The B–B bond of bis(trisyl)oxadiborirane OB 2 R 2 (R = C(SiMe 3 ) 3 ) is opened by amides R′CO(NHR″) to give the dioxaazadiboracyclohexanes [–BR–O–BR–NR″–CHR′–O–] (R′/R″ = H/H, H/Me, H/Et, Me/H: 5 a – d ). The amide MeCO(NHMe) yields 5 e (R′/R″ = Me/Me), when an excess of the amide is applied for 24 h, but yields an isomeric 1 : 1 adduct ( 6 e ), when a stoichiometric amount of the amide is applied for 15 h; upon refluxing this isomer in hexane, it is transformed into 5 e .