| 摘要 |
1462424 Methyl 3-(2-quinoxalinylmethylene)- carbazate-N<SP>1</SP>,N<SP>4</SP>-dioxide PFIZER Inc 15 March 1974 [10 April 1973] 11706/74 Heading C2C The title compound is prepared by reacting a nitrone, acetal, oxime, semicarbazone or thiosemicarbazone derivative of 2-formylquinoxaline-1,4-dioxide with NH 2 NHCO 2 Me or a hydrazone derived therefrom, provided that only said hydrazone may be used for reaction with an acetyl. Reference has been directed by the Comptroller to Specification 1,058,047. |
