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Stereoselective Radical Processes for C-H Alkylation and Amination

Award Number: R01GM132471
ORGANIZATION: NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 04/01/2020
PERIOD OF PERFORMANCE END DATE: 02/28/2025

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Stereoselective Radical Processes for C-H Alkylation and Amination - PROJECT SUMMARY/ABSTRACT Catalytic Radical Processes for Stereoselective C–H Alkylation and Amination Chiral molecules are of central importance in biology and medicine. The development of synthetic methodologies that allow for selective conversion of omnipresent C–H bonds into optically active compounds while installing various functionalities promises to transform the art and practice of organic synthesis and should lead to many new applications. Among different approaches, asymmetric C–H alkylation/amination via metal-catalyzed carbene/nitrene insertion represents one of the most attractive methods for enantioselective functionalization of C–H bonds. This type of catalytic carbene/nitrene transfer process provides a direct and general approach for the functionalization of C–H bonds in organic compounds through stereoselective C–C/C–N bond formation. It serves as a useful tool for the design and synthesis of biologically and pharmaceutically important chiral organic molecules. While considerable progress has been made for C–H alkylation and amination by existing catalytic systems with the use of certain type of diazo compounds as carbene sources and ArI=NTs as nitrene sources, important challenges remain in the field that validate the need to identify more effective carbene and nitrene sources in conjunction with the development of fundamentally new metal catalysts for C–H alkylation and amination. Guided by the concept of metalloradical catalysis (MRC), this research project is directed toward the development of new catalytic systems for stereoselective C–H alkylation and amination reactions. As stable metalloradicals, cobalt(II) complexes of porphyrins [Co(Por)] have been shown to function as a unique class of catalysts for C–H alkylation and amination through stepwise radical mechanism. Supported by porphyrin ligands bearing amide functionalities, the Co(II)-based MRC has been shown to be particularly effective in activating different classes of diazo reagents and organic azides for radical alkylation and amination of diverse types of C–H bonds, leading to C–C and C–N bond formation with effective control of reactivity and selectivity. In this proposal, we will focus on the utilization of cobalt(II) complexes of chiral amidoporphyrins [Co(II)(Por*)] as chiral metalloradical catalysts to advance enantioselective C–H alkylation and amination reactions for stereoselective synthesis of optically active organic molecules, including biologically important carbocycles and N-heterocycles. We hope these studies will ultimately lead to the development of Co(II)-based new catalytic systems for stereoselective C–H alkylation and amination reactions that can be generally applied toward practical synthesis of biologically important natural products and pharmaceutically interesting compounds.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2025 ( Subtotal = -$285 )
2025	2023	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	001	4	6/24/2025	SUPPLEMENT FOR EXPANSION	-$85
2025	2023	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	000	4	6/24/2025	NON-COMPETING CONTINUATION	-$200
														Subtotal = -$285

Issue Date FY: 2023 ( Subtotal = $558,159 )
2023	2023	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	001	4	6/2/2023	SUPPLEMENT FOR EXPANSION	$166,909
2023	2023	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	000	4	2/6/2023	NON-COMPETING CONTINUATION	$391,250
														Subtotal = $558,159

Issue Date FY: 2022 ( Subtotal = $391,250 )
2022	2022	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	001	3	6/9/2022	NON-COMPETING CONTINUATION	$39,125
2022	2022	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	000	3	1/27/2022	NON-COMPETING CONTINUATION	$352,125
														Subtotal = $391,250

Issue Date FY: 2021 ( Subtotal = $391,250 )
2021	2021	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	000	2	2/22/2021	NON-COMPETING CONTINUATION	$391,250
														Subtotal = $391,250

Issue Date FY: 2020 ( Subtotal = $391,250 )
2020	2020	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	001	1	7/1/2020	NEW	$0
2020	2020	TRUSTEES OF BOSTON COLLEGE	140 COMMONWEALTH AVE	CHESTNUT HILL	MA	02467	MIDDLESEX	USA	Biomedical Research and Research Training	000	1	3/27/2020	NEW	$391,250
														Subtotal = $391,250

Grand Total All Awards = $1,731,624

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Stereoselective Radical Processes for C-H Alkylation and Amination

Award Number: R01GM132471

ORGANIZATION: NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 04/01/2020

PERIOD OF PERFORMANCE END DATE: 02/28/2025

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