Atroposelective Synthesis of PINAP via Dynamic Kinetic Asymmetric Transformation
作者:Seo‐Jung Han、Vikram Bhat、Brian M. Stoltz、Scott C. Virgil
DOI:10.1002/adsc.201801248
日期:2019.2
The atroposelective synthesis of PINAP ligands has been accomplished via a palladium‐catalyzed C−P coupling process through dynamic kinetic asymmetric transformation. These catalytic conditions allow access to a wide variety of alkoxy‐ and benzyloxy‐substituted PINAP ligands in high enantiomeric excess. The methods described in this communication afford valuable P,N ligands in good yields and high
Dynamic Kinetic Cross-Coupling Strategy for the Asymmetric Synthesis of Axially Chiral Heterobiaryls
作者:Abel Ros、Beatriz Estepa、Pedro Ramírez-López、Eleuterio Álvarez、Rosario Fernández、José M. Lassaletta
DOI:10.1021/ja4087819
日期:2013.10.23
A dynamic kinetic asymmetric transformation (DYKAT) technique has been designed for the synthesis of 2'-substituted 2-aryl pyridines/isoquinolines and related heterobiaryls. In this way, the Pd(0)-catalyzed coupling of racemic 2-triflates with aryl boroxines using a TADDOL-derived phosphoramidite as the ligand provides the corresponding coupling products with good to excellent enantioselectivities
Synthesis of axially chiral heterobiaryl alkynes via dynamic kinetic asymmetric alkynylation
作者:Valentín Hornillos、Abel Ros、Pedro Ramírez-López、Javier Iglesias-Sigüenza、Rosario Fernández、José M. Lassaletta
DOI:10.1039/c6cc08997f
日期:——
The dynamic kinetic Pd0-catalyzed alkynylation of racemic heterobiaryl sulfonates was used for the asymmetric synthesis of axially chiral heterobiaryl alkynes with a broad scope.
Preparation and Resolution of a Modular Class of Axially Chiral Quinazoline-Containing Ligands and Their Application in Asymmetric Rhodium-Catalyzed Olefin Hydroboration
作者:David J. Connolly、Patrick M. Lacey、Mary McCarthy、Cormac P. Saunders、Anne-Marie Carroll、Richard Goddard、Patrick J. Guiry
DOI:10.1021/jo049195+
日期:2004.10.1
Displacement of the resolving agent by reaction with 1,2-bis(diphenylphosphino)ethane afforded enantiopure ligand in each case. Their rhodium complexes were prepared and applied in the enantioselective hydroboration of a range of vinylarenes. The quinazolinap catalysts were found to be extremely active, giving excellent conversions, good to complete regioselectivities, and the highest enantioselectivities obtained
Synthesis of IAN-type N,N-Ligands via Dynamic Kinetic Asymmetric Buchwald–Hartwig Amination
作者:Pedro Ramírez-López、Abel Ros、Antonio Romero-Arenas、Javier Iglesias-Sigüenza、Rosario Fernández、José M. Lassaletta
DOI:10.1021/jacs.6b07972
日期:2016.9.21
nonaflates with aryl/alkyl primary amines using QUINAP as the ligand provides the corresponding axially chiral heterobiaryl amines with excellent yields and enantioselectivities. Reactivity and structural studies of neutral and cationic oxidative addition intermediates support a dynamic kinetic asymmetric amination mechanism based on the labilization of the stereogenic axis in the latter and suggest that