6533b852fe1ef96bd12aaaba

RESEARCH PRODUCT

ChemInform Abstract: On the Reactivity of Nitrosoimidazoles with Acids (the Cusmano-Ruccia Reaction): A Continuous Source of New Ring-into-Ring Interconversion.

Barbara CosimelliDomenico SpinelliMirella RambaldiVincenzo FrennaElda Severi

subject

chemistry.chemical_compoundchemistryStereochemistryImidazoleReactivity (chemistry)AmmoniumHydrochloric acidGeneral MedicineMethanolRing (chemistry)IonOxazole

description

Abstract An extension of the ‘Cusmano–Ruccia’ reaction is reported. 6-(4-chlorophenyl)-3-methyl-5-nitrosoimidazo[2,1- b ]oxazole by the action of hydrochloric acid gives 3-(4-chlorobenzoyl)-5-methyl-1,2,4-oxadiazole ( 13 ); presumably via ammonium ion, CO 2 and methanol elimination. The relevance of the nature of the atom of the B -ring linked to C-2 of the imidazole for the occurrence of the ring-into-ring interconversion has been once more confirmed.

https://doi.org/10.1002/chin.201429161