Photochemistry of 4,6-Diazido-3-methylisoxazolo[4,5-c]pyridine: a Convenient Entry to 3-Methylisoxazolo[1,3]diazepine Systems†
作者:Donato Donati、Stefania Fusi、Fabio Ponticelli
DOI:10.1039/a608413c
日期:——
UV irradiation of 4,6-diazido-3-methylisoxazolo[4,5-c]pyridine in methanol gives the 3-methylisoxazolo-1,3-diazepine derivatives 3,4 by nitrogen loss and solvent addition.
Ringopening with molybdenum hexacarbonyl of functionalized isoxazoles is a valuable synthetic process. Tetrazolopyridine 4 and pyrazolopyridine 9 were obtained from isoxazolopyridines 3 and 6, respectively, whereas the isoxazole 14 gave ketone 16 through the intermediate 17.