Fixation of carbon dioxide and related small molecules by a bifunctional frustrated pyrazolylborane Lewis pair
作者:Eileen Theuergarten、Janin Schlösser、Danny Schlüns、Matthias Freytag、Constantin G. Daniliuc、Peter G. Jones、Matthias Tamm
DOI:10.1039/c2dt30448a
日期:——
The bifunctional frustrated Lewispair 1-[bis(pentafluorophenyl)boryl]-3,5-di-tert-butyl-1H-pyrazole (1) was employed for small molecule fixation by reaction with carbondioxide, paraformaldehyde, tert-butyl isocyanate, tert-butyl isothiocyanate, methyl isothiocyanate and benzonitrile, affording the adducts 3–8 as zwitterionic, bicyclic boraheterocycles. Treatment of 1 with tert-butyl isocyanide gave