Highly Regio-, Diastereo-, and Enantioselective C−H Insertions of Methyl Aryldiazoacetates into Cyclic N-Boc-Protected Amines. Asymmetric Synthesis of Novel C2-Symmetric Amines and threo-Methylphenidate
Kinetic Resolution and Double Stereodifferentiation in Catalytic Asymmetric C−H Activation of 2-Substituted Pyrrolidines
作者:Huw M. L. Davies、Chandrasekar Venkataramani
DOI:10.1021/ol015974q
日期:2001.5.1
Dirhodium tetrakis (S-(N-dodecylbenzenesulfonyl)prolinate (Rh-2(S-DOSP)(4)) catalyzed decomposition of methyl aryldiazoacetates in the presence of a substituted pyrrolidines results in highly diastereoselective and enantioselective C-H insertions, These reactions can proceed with impressive levels of double stereodifferentiation and kinetic resolution, which allows for three stereocenters to be controlled during the C-H insertion step.
New Strategic Reactions for Organic Synthesis: Catalytic Asymmetric C−H Activation α to Nitrogen as a Surrogate for the Mannich Reaction
作者:Huw M. L. Davies、Chandrasekar Venkataramani、Tore Hansen、Darrin W. Hopper
DOI:10.1021/ja0290072
日期:2003.5.1
activation reactions of methyl aryldiazoacetates are readily induced by the rhodium prolinate catalyst Rh(2)(S-DOSP)(4) (1) or the bridged prolinate catalysts Rh(2)(S-biDOSP)(2) (2a) and Rh(2)(S-biTISP)(2) (2b). The C-H activation of N-Boc-protected cyclic amines demonstrates that the donor/acceptor-substituted carbenoids display remarkable chemoselectivity, which allows for highly regioselective,
Highly Regio-, Diastereo-, and Enantioselective C−H Insertions of Methyl Aryldiazoacetates into Cyclic N-Boc-Protected Amines. Asymmetric Synthesis of Novel <i>C</i><sub>2</sub>-Symmetric Amines and <i>threo</i>-Methylphenidate
作者:Huw M. L. Davies、Tore Hansen、Darrin W. Hopper、Stephen A. Panaro