发明授权
US4596869A Pyridinyl and pyrimidinyl derivatives 失效
吡啶基和嘧啶基衍生物

Pyridinyl and pyrimidinyl derivatives
摘要:
A novel compound, useful as an intermediate in the production of compounds of high antimicrobial activity, of the formula: ##STR1## wherein R.sub.a.sup.1 is hydrogen, amino or a protected amino group,R.sub.b.sup.1 and R.sub.c.sup.1 are each hydrogen, halogen, lower alkoxy or arylthio,R.sup.14 is carboxy or a protected carboxy group,X is lower alkylene or a group of the formula: ##STR2## in which R.sup.6 is hydrogen or an organic residue which may have suitable substituent(s), andZ is N or CH,or a salt thereof.
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