Reaction of 8a-Methoxy-3,4-dihydro-2H-1,4-benzoxazin-6(8aH)-ones with Diazoalkanes, II

Article abstract of DOI:10.1007/BF00811545

8a-Methoxy-3,4-dihydro-2H-1,4-benzoxazin-6(8aH)-ones 2 undergo regio- and stereospecific 1,3-dipolar cycloaddition reactions with diazomethane or diazoethane to yield 3,4,6a,9,9a,9b-hexahydro-pyrazolo<3,4-h><1,4>benzoxazin-6(2H)-ones 3, which slowly isome