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Chemie der Amino-oxime, XIII. 3,6-Dihydro-2(1H)-pyrazinon-4-oxide
Gnichtel, Horst,Schmitt, Bernhard,Schunk, Guenter
, p. 2536 - 2541 (2007/10/02)
The 3,6-dihydro-2(1H)-pyrazinone 4-oxides 3a - c were prepared by cyclisation of anti-α-(chloroacetylamino)ketoximes 2a - c.From 3 with PCl3 the 3,6-dihydro-2(1H)-pyrazinones 5a and b were formed.Cycloaddition of 3 with dimethyl acetylenedicarboxylate yie
