Abstract An easy one-step synthesis of 3,4-diarylsydnones from 3-arylsydnones and arylboronic acids by Pd-catalyzed C–H bond activation is described. An easy one-step synthesis of 3,4-diarylsydnones from 3-arylsydnones and arylboronic acids by Pd-catalyzed C–H bond activation is described.
report an efficient catalytic, one-pot, synthesis of sydnone heterocycles from readily available α-amino acid derivatives using inexpensive N,N′-dimethylformamide as a precatalyst and oxalyl chloride as a stoichiometric oxidant. This operationally simple procedure benefits from mild conditions and short reaction times as showcased by the synthesis of various substituted sydnone heterocycles in good yields