Studies on azole-to-azole interconversion - An interesting case of absence of a "primary steric effect" in the ring-degenerate equilibration between ortho-substituted 3-aroylamino-5-methyl-1,2,4-oxadiazoles and 3-acetylamino-5-aryl-1,2,4-oxadiazoles in me

Article abstract of DOI:10.1002/1099-0690(200204)2002:8<1417::AID-EJOC1417>3.0.CO;2-G

The title reaction has been studied by ¹H NMR, both in CD₃OD and in tBuOK/CD₃OD. The components of the electronic effect of the substituent on the benzene ring show different contributions depending on whether the equilibr