Heterocycles p. 69 - 80 (2000)
Update date:2022-08-03
Topics:
Corsaro, Antonino
Chiacchio, Ugo
Pistara, Venerando
Perrini, Giancarlo
2(1H)-Pyrazinone, which is in equilibrium with 2-pyrazinol, reacts with benzonitrile oxide (BNO) affording the N-adducl with a 67% yield, while 2-methoxypyrazine gives two methoxypyrazinones (ca. 3%) and a biscycloadduct together with its degradation product, which derive from the two unisolable monocycloadducts to the C=N4 double bond. Af-Methylpyrazinone gives only the degradation product (3.4%) of the initial monocycloadduct of BNO to C=N4: double bond.
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