New Strategic Reactions for Organic Synthesis: Catalytic Asymmetric C−H Activation α to Nitrogen as a Surrogate for the Mannich Reaction
The asymmetric C−H activation reactions of methyl aryldiazoacetates are readily induced by the rhodium prolinate catalyst Rh2(S-DOSP)4 (1) or the bridged prolinate catalysts Rh2(S-biDOSP)2 (2a) and Rh2(S-biTISP)2 (2b). The C−H activation of N-Boc-protected cyclic amines demonstrates that the donor/a...
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Published in | Journal of the American Chemical Society Vol. 125; no. 21; pp. 6462 - 6468 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
WASHINGTON
American Chemical Society
28.05.2003
Amer Chemical Soc |
Subjects | |
Online Access | Get full text |
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Summary: | The asymmetric C−H activation reactions of methyl aryldiazoacetates are readily induced by the rhodium prolinate catalyst Rh2(S-DOSP)4 (1) or the bridged prolinate catalysts Rh2(S-biDOSP)2 (2a) and Rh2(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, diastereoselective, and enantioselective reactions to be achieved. Furthermore, the reactions can display high levels of double stereodifferentiation and kinetic resolution. The C−H activation is caused by a rhodium carbenoid induced C−H insertion. The potential of this chemistry is demonstrated by a very direct synthesis of threo-methylphenidate. |
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Bibliography: | istex:2B189210EB453685AFA99B1AFE9DBCED8BB8587D ark:/67375/TPS-SGSDS81L-Q Medline NIH RePORTER ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0002-7863 1520-5126 |
DOI: | 10.1021/ja0290072 |