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    • 4. 发明授权
    • Cephalosporin derivatives
    • 头孢菌素衍生物
    • US5461044A
    • 1995-10-24
    • US369274
    • 1995-01-05
    • Masaki TsushimaKatsuyoshi IwamatsuAtsushi TamuraSeiji Shibahara
    • Masaki TsushimaKatsuyoshi IwamatsuAtsushi TamuraSeiji Shibahara
    • A61K31/545A61K31/546A61P31/04C07D501/00C07D501/59
    • C07D501/00Y02P20/55
    • As new antibacterial agent are provided cephalosporin derivatives having a general formula (I): ##STR1## wherein R.sup.1 is a hydrogen atom, a lower alkyl group or a substituted lower alkyl group, R.sup.2 is a hydrogen atom or an ester-forming group easily cleavable by an esterase present in the digestive tracts, R.sup.3 and R.sup.4 may be the same and each is independently a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkenyl group, hydroxyl group, amino group or a lower alkoxy group, and a pharmaceutically acceptable salt thereof.The cephalosporin derivative of formula (I) is useful as an orally or injectably administrable cephalosporin derivative which exhibits in combination a high antibacterial activity and a favorable characteristic capable of giving a high concentration of this compound in blood when administered.
    • 作为新的抗菌剂,提供具有通式(I)的头孢菌素衍生物:其中R 1为氢原子,低级烷基或取代的低级烷基,R 2为氢原子或酯形成 可以通过存在于消化道中的酯酶容易地切割,R3和R4可以相同,各自独立地为氢原子,卤素原子,低级烷基,低级烯基,羟基,氨基或低级烷氧基 基团及其药学上可接受的盐。 式(I)的头孢菌素衍生物可用作口服或可注射给药的头孢菌素衍生物,其组合具有高的抗菌活性和在给药时能够在血液中给予高浓度该化合物的有利特征。
    • 8. 发明授权
    • Cephem derivatives
    • Cephem衍生物
    • US5883089A
    • 1999-03-16
    • US750945
    • 1997-03-12
    • Eijiro UmemuraKunio AtsumiKatsuyoshi IwamatsuAtsushi Tamura
    • Eijiro UmemuraKunio AtsumiKatsuyoshi IwamatsuAtsushi Tamura
    • A61K31/545A61P31/04C07D501/00C07D501/56C07D519/06
    • C07D501/00Y02P20/55
    • Compounds, represented by the following formula (I), having a .beta.-(substituted or unsubstituted imidazo�5,1-b!thiazolyl)vinyl group at the 3-position of the cephem ring and a salt and an ester thereof are disclosed. The compounds have antibacterial activity against a very wide spectrum of bacteria and potent antibacterial activity against Gram-positive bacteria, Gram-negative bacteria, and resistant bacteria. ##STR1## wherein X represents CH or N, R.sup.1 represents a hydrogen atom or an amino protective group, R.sup.2 represents a hydrogen atom, a C.sub.1-6 alkyl group, a C.sub.3-7 cycloalkyl group, or a hydroxy protective group, R.sup.3 is absent or represents a hydrogen atom, a salt forming cation, or a carboxyl protective group, R.sup.4, R.sup.5, and R.sup.6, which may be the same or different, each independently represent a hydrogen atom or a C.sub.1-6 alkyl group, R.sup.7+ is absent or a cation of a C.sub.1-6 alkyl, and n is an integer of 0 to 1.
    • PCT No.PCT / JP96 / 01406 Sec。 371日期1997年4月3日 102(e)日期1997年4月3日PCT提交1996年5月24日PCT公布。 WO94 / 37499 PCT公开号 日期:1996年11月28日由以下式(I)表示的化合物在头孢烯环的3位具有β - (取代或未取代的咪唑并[5,1-b]噻唑基)乙烯基, 酯。 该化合物对细菌的细菌具有抗菌活性,对革兰氏阳性菌,革兰氏阴性菌和耐药菌具有强力的抗菌活性。 其中X表示CH或N,R 1表示氢原子或氨基保护基,R 2表示氢原子,C 1-6烷基,C 3-7环烷基或羟基 保护基,R3不存在或表示氢原子,形成盐的阳离子或羧基保护基,R4,R5和R6可以相同或不同,各自独立地表示氢原子或C1-6烷基 基团,R 7 +不存在或C 1-6烷基的阳离子,n为0〜1的整数。