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Upstream product

• 236755-48-9 (2R,3S,4S,5R)-2-(acetoxymethyl)-5-(2-amino-6-phenyl-9H-purin-9-yl)tetrahydrofuran-3,4-diyl diacetate 
• 98-59-9 p-toluenesulfonyl chloride 
• 16321-99-6 2-amino-6-chloro-9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)purine 
• 98-80-6 phenylboronic acid 
• 941-55-9 4-toluenesulfonyl azide 

Relevant academic research and scientific papers

Chelation-Assisted Rhodium-Catalyzed Direct Amidation with Amidobenziodoxolones: C(sp2)-H, C(sp3)-H, and Late-Stage Functionalizations

Air-stable and convenient amidobenziodoxolones as an amidating reagent were disclosed to enable direct amidation on a wide range of C(sp2)-H bonds of (hetero)arenes and alkenes, as well as unactivated C(sp3)-H bonds under RhIII catalysis. The approach to access 49 examples of structurally diverse amides is featured by mild conditions, complete chemoselectivity and regioselectivity, broad substrate scope (not limited to strongly heterocyclic coordinating groups), and tolerance of valuable functional substituents, such as unprotected amine and hydroxyl groups. The synthetic applicability of this protocol is also demonstrated by late-stage functionalization of biologically important scaffolds.

Rhodium-catalyzed intermolecular amidation of arenes with sulfonyl azides via chelation-assisted C-H bond activation

We report the direct amidation of arene C-H bonds using sulfonyl azides as the amino source to release N2 as the single byproduct. The reaction is catalyzed by a cationic rhodium complex under external oxidant-free conditions in the atmospheric environment. A broad range of chelate group-containing arenes are selectively amidated with excellent functional group tolerance, thus opening a new avenue to practical intermolecular C-N bond formation.