Hydrogen activation by 2-boryl-N,N-dialkylanilines: A revision of Piers' ansa-aminoborane
Two 2-[bis(pentafluorophenyl)boryl]-N,N-dialkylanilines reported here exemplify a new class of intramolecular frustrated B/N Lewis pairs. A structure closely related to this class structure was synthesized in 2003 by Piers et al. but was unable to activate H2. The new aminoboranes can activate hydrogen at near ambient conditions; besides, one of them can hydrogenate imines and enamines in a catalytic fashion demonstrating the validity of the original Piers' approach to hydrogen activation with ansa-aminoboranes.
Chernichenko, Konstantin,Nieger, Martin,Leskelae, Markku,Repo, Timo
supporting information; body text
p. 9029 - 9032
(2012/09/08)
Synthesis of pyrrolidin-2-ones by 5-endo-trigonal radical cyclisation of N-vinyl-2,2-bis(phenylsulfanyl)acetamides
A series of N-methyl-N-(1-substituted or 1,2-disubstituted vinyl)-2,2-bis(phenylsulfanyl)acetamides, upon treatment with tributyltin hydride in the presence of a catalytic amount of AIBN in boiling toluene, underwent smooth cyclisation in a 5-endo-trig ma