- Enantioselective construction of sterically hindered tertiary α-aryl ketones: A catalytic asymmetric synthesis of isoflavanones
-
A method for the catalytic asymmetric α-arylation of ketones bearing very sterically hindered aryl rings has been developed. This reaction occurs under mild conditions, in short reaction times and has been applied to the first catalytic asymmetric synthesis of isoflavanones.
- Carroll, Michael P.,Mueller-Bunz, Helge,Guiry, Patrick J.
-
supporting information
p. 11142 - 11144
(2013/01/15)
-
- Untersuchungen an Arylbleitriacetaten. Roentgenstrukturanalyse von 2-Methylphenyl- und 2-Chlorophenylbleitriacetat
-
The crystal structures of 2-XC6H4Pb(OAc)3 (X = CH3, Cl; OAc = OOCCH3) have been determined by X-ray diffraction.Both compounds are isostructural and crystallize as triclinic, space group P.They consist of monomers, the seven-coordinated central atom being in a distorted pentagonal-bipyramidal environment with five O atoms of the three unsymmetrically chelating carboxylate groups in equatorial positions, and one O and one C(aryl) atom in axial positions.IR, 1H, 13C and 207Pb NMR spectroscopic data of these and other monoaryllead triacetates are reported, and similar structures with seven-coordinated lead are inferred.Weak coordination of Y to Pb is discussed to exist possibly in 2-YC6H4Pb(OAc)3 (Y = F, Cl, OCH3).
- Huber, F.,Preut, H.,Scholz, D.,Schuermann, M.
-
p. 227 - 239
(2007/10/02)
-
- Reaction of Arylboronic Acids and their Derivatives with Lead Tetra-acetate. The Generation of Aryl-lead Triacetates, and meta- and para-Phenylenebis(lead triacetate), in situ for Electrophilic Arylation
-
Arylboronic acids and some of their derivatives have been found to undergo a rapid boron-lead exchange with lead tetra-acetate.In the presence of a catalytic amount of mercury(II) acetate, the reaction produces mainly the aryl-lead triacetate, and it has been developed as a convenient method for in situ generation of these useful electrophilic C-arylating reagents.The reaction allows the generation for the first time of meta- and para-phenylenebis(lead triacetate), compounds which behave as meta- and para-phenylene dication equivalents.
- Morgan, Jacqueline,Pinhey, John T.
-
p. 715 - 720
(2007/10/02)
-