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PHOTOINDUCED, COPPER-CATALYZED SUBSTITUTION REACTIONS OF ALKYL ELECTROPHILES BY NITROGEN NUCLEOPHILES

$55,527R01FY2019GMNIH

California Institute Of Technology, Pasadena CA

Investigators

Linked publications & trials

Abstract

PROJECT SUMMARY/ABSTRACT    Because a wide array of nitrogen-­??containing compounds exhibit bioactivity, the development of new  methods for the formation of C?N bonds is a central challenge in organic chemistry.  Furthermore,  because the two mirror-­??image isomers (?enantiomers?) of a molecule generally have different biological  activity due to the ?handedness? of the molecules of life (e.g., peptides, DNA, RNA, and carbohydrates),  there is a need in the biomedical community to efficiently generate compounds in stereoisomerically pure  form.  Finally, the development of catalyzed reactions is desirable, since they often offer advantages from  the standpoints of efficiency/economy.  This proposal is directed at addressing all three of these challenges, specifically, the discovery of new  methods for the catalytic and enantioselective synthesis of nitrogen-­??containing compounds.  In particular,  the research plan describes the development of the first photoinduced, copper-­??catalyzed methods for the  construction of C?N bonds.  The coupling reactions are anticipated to proceed under unusually mild  conditions, to have broad applicability for the generation of diverse families of nitrogen-­??containing  compounds, and to proceed with good stereoselectivity (when applicable).  Furthermore, the research  plan describes mechanistic studies (e.g., stereochemical, mass spectrometry, fluorometry, and electron  paramagnetic resonance spectroscopy) that will provide insight into the unusual reaction pathway of  these photoinduced, copper-­??catalyzed C?N bond-­??forming reactions, which likely proceed through a  radical intermediate.

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PHOTOINDUCED, COPPER-CATALYZED SUBSTITUTION REACTIONS OF ALKYL ELECTROPHILES BY NITROGEN NUCLEOPHILES · GrantIndex