发明授权
US5072038A 2,3,4,5-tetrahalogenobenzene derivatives 失效
2,3,4,5-四氢生物碱衍生物

2,3,4,5-tetrahalogenobenzene derivatives
摘要:
2,3,4,5-trihalogenobenzene derivatives of the formula ##STR1## in which R is --COOH, --COCl, --COF, --CN, --CONH.sub.2, --CH.sub.2 OH, --CH.sub.2 Cl, --CHCl.sub.2, --CCl.sub.3 or --CHO,R.sup.1 is H, Cl or F, andR.sup.2 is Cl or F,it only being possible for R.sup.1 or R.sup.2 to be F, and processes for their preparation starting from benzonitriles reacted with potassium fluoride. The novel compounds are intermediates for antibacterials such as quinolone carboxylic acids.
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