Advances in Skeletal Editing and Rearrangement Reactions
Palladium-Catalyzed Unimolecular Fragment Coupling of N-Allylamides Bearing a Tethered Nucleophile with the Translocation of an Amide Group
Ryoma Shimazumi
a
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
,
Takuya Kodama
a
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
b
Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
a
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
b
Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
› InstitutsangabenThis work was supported by the Japan Society for the Promotion of Science (JSPS KAKENHI; grant number JP21H04682) from MEXT, Japan. R.S. thanks the Japan Science and Technology Agency (JST SPRING; grant number JPMJSP2138) for support.
The palladium-catalyzed reaction of N-allylamides bearing a tethered nucleophile results in the extrusion of an amide moiety in the form of an isocyanate, with its subsequent capture by the pendant nucleophile. This reaction involves the net catalytic transposition of an amide group.
8f
Bartholomew GL,
Carpaneto F,
Sarpong R.
J. Am. Chem. Soc. 2022; 144: 22309 ; see also refs. 4a–c for substitution via decarbonylation and decarboxylation. Other related examples can also be found in ref. 1d
9 The allylic substitution of allyl carbamates bearing a tethered nucleophile was reported to give products with CO2 incorporation. However, such reactions are not classified as cut-and-paste type editing, because part of the group in the substrate (i.e., a MeO group) is eliminated as a result of the transformation. See:
Feng H.
Chem. Heterocycl. Compd. (Engl. Transl.) 2020; 56: 506
10 The low reactivity of electron-rich isocyanates against nucleophiles is another potential reason. See:
Rawling T,
McDonagh AM,
Tattam B,
Murray M.
Tetrahedron 2012; 68: 6065