Toure, Momar; Chuzel, Olivier; Parrain, Jean-Luc published the artcile< Asymmetric Rhodium-Directed anti-Markovnikov Regioselective Boracyclopentannulation>, Related Products of 139139-93-8, the main research area is asym rhodium directed anti Markovnikov regioselective boracyclopentannulation; crystal mol structure allylimidazolylidene borane imidazoloboracyclopentane compound.
A Shimoi-type activation of B-H bond of NHC-boranes by a diphosphine-ligated cationic Rh complex was applied in an unprecedented intramol. hydroboration reaction of simple olefins. The use of NHC-boranes as hydroborating reagents is still undisclosed due to their nonreactivity toward alkenes which could be explained by the high stability of this complex rendering it unable to provide a “”free”” borane hydroborating reagent. B-H bond Rh activation of NHC-borane circumvents this limitation, and asym. Rh-directed anti-Markovnikov boracyclopentannulation reaction led to a library of enantioenriched cyclic boranes in high yield (up to 94%) with high regio- (up to 100%) and enantioselectivity (er up to 99.2:0.8). This new activation mode of NHC-boranes highlights their use in organometallic chem. and offers a very good approach to access chiral cyclic NHC-boranes.
Journal of the American Chemical Society published new progress about Addition reaction (anti-Markovnikov). 139139-93-8 belongs to class chiral-phosphine-ligands, and the molecular formula is C44H40P2, Related Products of 139139-93-8.
Referemce:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate