Monatshefte fur Chemie p. 899 - 910 (1992)
Update date:2022-07-31
Topics:
Schubert-Zsilavecz, Manfred
Belaj, Ferdinand
Ott, Robert
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
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