Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 3,5-Dimethyl-4-nitropyridine 1-oxide, is researched, Molecular C7H8N2O3, CAS is 14248-66-9, about Studies on diazepines. XXVI. Syntheses of 6H-1,4-diazepines and 1-acyl-1H-1,4-diazepines from 4-pyridyl azides.Recommanded Product: 3,5-Dimethyl-4-nitropyridine 1-oxide.
Photolysis of 4-azidopyridines I (R-R3 = H, Me) in the presence of methoxide resulted in ring expansion to give 5-methoxy-6H-1,4-diazepines II (R-R3 = H, Me), presumably via azirine intermediates derived from the initially formed singlet pyridylnitrenes. Treatment of II (R-R3 = H) with R4COCl (R4 = Ph, Me, EtO) in pyridine afforded the 1-acyldiazepines III (R4 = Ph, Me, EtO), whose structures were confirmed by means of thermal and photochem. reactions.
From this literature《Studies on diazepines. XXVI. Syntheses of 6H-1,4-diazepines and 1-acyl-1H-1,4-diazepines from 4-pyridyl azides》,we know some information about this compound(14248-66-9)Recommanded Product: 3,5-Dimethyl-4-nitropyridine 1-oxide, but this is not all information, there are many literatures related to this compound(14248-66-9).
Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem