2720-03-8Relevant articles and documents
Metal-Free Acetylene Coupling by the (C6F5)2B?X 1,2-Halogenoboration Reaction
Ueno, Atsushi,Li, Jun,Daniliuc, Constantin G.,Kehr, Gerald,Erker, Gerhard
, p. 10044 - 10048 (2018)
(C6F5)2B-halides were conveniently prepared by treatment of (C6F5)2BH with tritylchloride or -bromide, respectively. With cyclopropylacetylene, (C6F5)2BBr underwent sequential cis-1,2-halogenoboration followed by 1,2-carboboration to give the 4-bromo-2,4-dicyclopropylbutadienyl-B(C6F5)2 product. It reacted further with additional cyclopropylacetylene to give the linear triene and tetraene products in a metal-free alkyne oligomerization reaction. The pyridine adduct of the initial diene product was characterized by X-ray diffraction. (C6F5)2BCl reacted analogously. Similar (C6F5)2BX induced oligomerization reactions were carried out with two conjugated enynes.
Bonding in Barium Boryloxides, Siloxides, Phenoxides and Silazides: A Comparison with the Lighter Alkaline Earths
Carpentier, Jean-Fran?ois,Cordier, Marie,Dorcet, Vincent,Hammoud, Joanna,Kahlal, Samia,Le Coz, Erwann,Roisnel, Thierry,Saillard, Jean-Yves,Sarazin, Yann
supporting information, p. 11966 - 11982 (2021/07/16)
Barium complexes ligated by bulky boryloxides [OBR2]? (where R=CH(SiMe3)2, 2,4,6-iPr3-C6H2 or 2,4,6-(CF3)3-C6H2), siloxide
Bis(pentafluorophenyl)phenothiazylborane-an intramolecular frustrated Lewis pair catalyst for stannane dehydrocoupling
Bentley, Jordan N.,Caputo, Christopher B.,Pradhan, Ekadashi,Zeng, Tao
supporting information, p. 16054 - 16058 (2020/12/03)
We synthesized a novel Lewis acidic aminoborane containing a phenothiazyl substituent and demonstrated its potential to catalytically promote the dehydrocoupling of tin hydrides. The observed reactivity would imply a homolytic frustrated Lewis pair type mechanism, however computational analysis suggests a heterolytic mechanism for this reaction. This result represents one of the first frustrated Lewis pair systems to dehydrocouple stannanes in a heterolytic fashion.