申请人:ELI LILLY AND COMPANY
公开号:EP0017494A2
公开(公告)日:1980-10-15
This invention relates to novel hydroxyimino-substituted aminoacetonitriles, which are intermediates in the preparation of substituted 2-aminopyrazines, which latter compounds are intermediates in the preparation of insecticidal benzoylpyrazinylureas. The hydroxyimino-substituted aminoacetonitriles are of the formula
wherein
R' is hydrogen or C1-C4 alkyl;
R2 is hydrogen, halo, C1-C3 alkyl, or trifluoromethyl;
n is 0, 1 or 2, with the proviso that when n=2, only one ortho position may be substituted; and
R3 is C1-C4 alkyl.
These compounds are prepared by reacting an aminoacetonitrile with the appropriate a-chloro or a-bromo oxime.
本发明涉及新型羟基亚氨基取代的氨基丙酮腈,它们是制备取代的 2-氨基吡嗪的中间体,后一种化合物是制备杀虫的苯甲酰吡嗪脲的中间体。羟基亚氨基取代的氨基丙酮腈的化学式为
其中
R' 是氢或 C1-C4 烷基;
R2 是氢、卤代、C1-C3 烷基或三氟甲基;
n 是 0、1 或 2,但当 n=2 时,只有一个正交位置可以被取代;以及
R3 是 C1-C4 烷基。
这些化合物是通过氨基乙腈与适当的a-氯或a-溴肟反应制备的。