Spectroscopic Investigation of the Remote C-H Allylation of Amides via Photoredox and Nickel Dual Catalysis

被引：0
作者：
Bourgois, Celine [1 ]
De Kreijger, Simon [1 ]
Xu, Bin [2 ]
Tambar, Uttam K. [2 ]
Troian-Gautier, Ludovic [1 ,3 ]
机构：
[1] Univ Catholique Louvain UCLouvain, Inst Matiere Condensee & Nanosci IMCN, Mol Chem Mat & Catalysis MOST, Pl Louis Pasteur 1,Bte L4 01-02, B-1348 Louvain La Neuve, Belgium
[2] Univ Texas Southwestern Med Ctr Dallas, Dept Biochem, 5323 Harry Hines Blvd, Dallas, TX 75390 USA
[3] Wel Res Inst, Ave Pasteur 6, B-1300 Wavre, Belgium
来源：
SYNLETT | 2024年 / 35卷 / 16期
关键词：
photoredox; energy transfer; mechanism; iridium; transient absorption; quenching; Stern-Volmer; SUBSTITUTION; COMPLEXES; PHOTOCHEMISTRY; RELEASE; BINDING; BONDS; TIO2;
D O I：
10.1055/a-2259-3594
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The mechanistic details of a reported allylation reaction are investigated by means of Stern-Volmer experiments and nano second transient absorption spectroscopy. Both reference substrates, i.e., an allylic chloride and a trifluoroacetamide, are inefficient quenchers butlarge quenching rate constants are observed upon the addition of Ni(COD)(2) and a bisoxazoline ligand. The large quenching rate constants and absence of observable photoproducts are consistent with a mechanism that operates by energy transfer between the excited-state iridium photosensitizer and the nickel complex
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页码：1893 / 1898
页数：6
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