| 摘要 |
Derivatives of 5-norbicyclomycin of the formula <IMAGE> wherein R represents an unsubstituted or substituted monovalent hydrocarbon radical in which one, two or more carbon atoms can be replaced by heteroatoms, and X represents a bivalent group of the formula -O- or -N(R')-, wherein R' has one of the meanings assigned to R, whilst R and R', if both have a meaning which is different from hydrogen, can also be linked to each other through a C-C bond or an oxygen, sulphur or nitrogen atom, and corresponding compounds, in which at least one hydroxyl group is protected, and salts of said compounds, provided they contain salt-forming groups, are useful as antibiotics, especially against Enterobacteriaceae, or as intermediates for the production of such antibiotics. They are obtained by condensing a corresponding 5-norbicyclomycin-5-one with a compound of the formula R-X-NH2 in which X and R have the above meaning. |
