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US4804394A Benzoxazines and use as herbicides 失效
苯并恶嗪并用作除草剂

Benzoxazines and use as herbicides
摘要:
Novel benzoxazines of the formula (I) ##STR1## wherein X is hydrogen or halogen,R.sup.1 is hydrogen or C.sub.1 -C.sub.2 -alkyl,R.sup.2 is cyano, trimethylsilyl, trimethylsilylmethoxycarbonyl, C.sub.1 -C.sub.4 -alkylthio or cyclopropyl andQ is ##STR2## and the use of the novel compounds as herbicides, and intermediates for the preparation of the novel benzoxazines.
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