摘要:
The present invention relates to novel compounds of formula (I),
to a process for their manufacture, to pharmaceutical compositions containing them, and to their use in therapy, in particular their use in the prophylaxis and treatment of respiratory diseases.
摘要:
Cephalosporin antibiotics of general formula (wherein R 8 and R b , which may be the same or different, each represents a hydrogen atom or a methyl or ethyl group, and R represents a 3- or 4-carbamoyl group or a hydrogen atom) and non-toxic salts and non-toxic metabolically labile esters thereof. The compounds exhibit broad spectrum antibiotic activity both in vitro and in vivo, and may be used for treating a variety of diseases caused by pathogenic bacteria in human beings and animals. Pharmaceutical compositions containing the compounds and processes for the preparation of the compounds are also described.
摘要:
Compounds of formula (I) wherein R 1 represents a hydrogen atom or a C 1-4 alkyl group optionally substituted by one to three halogen atoms; R 2 and R 3 , which may be the same or different, each represents a hydrogen atom or a carboxyl blocking group; R 4 represents a hydrogen atom or an amino protecting group; R 5 and R 6 each represents a hydroxy or substituted hydroxy group or R 5 and R 6 together represent a cyclic protected diol group; Z is -S-or -SO-(α-or β-) and the dotted line bridging the 2-, 3-, and 4-positions indicate that the compound is a ceph-2-em or ceph-3-em compound; and salts and solvates thereof.
摘要:
There is described a process for the preparation of compounds of general formula (I) (wherein R 1 represents an amino or protected amino group, R 2 is hydrogen or a carboxyl blocking group, B is S or S → 0 and the dotted line indicates that the compound is a ceph-2-em or ceph-3-em compound) or a corresponding compound having a group -COOR 3 (wherein R 3 is a carboxyl blocking group) at the 4-position and an associated anion A G which comprises reacting a compound of formula (II) (wherein R 1 ,B and the dotted line are as defined above) or a corresponding compound having a group -COOR 3 at the 4-position (where R 3 is as described above) and an associated anion A with a hydroxylamine derivative of formula (III) (wherein R 2 is as defined above), or a salt or Zwitterion thereof. The process is of value as a means of preparing the antibiotic ceftazidime. Intermediates of value in the process and of methods of preparing them are also disclosed.
摘要:
There is described a process for the preparation of compounds of general formula (I) (wherein R 1 represents an amino or protected amino group, R 2 is hydrogen or a carboxyl blocking group, B is S or S → 0 and the dotted line indicates that the compound is a ceph-2-em or ceph-3-em compound) or a corresponding compound having a group -COOR 3 (wherein R 3 is a carboxyl blocking group) at the 4-position and an associated anion A G which comprises reacting a compound of formula (II) (wherein R 1 ,B and the dotted line are as defined above) or a corresponding compound having a group -COOR 3 at the 4-position (where R 3 is as described above) and an associated anion A with a hydroxylamine derivative of formula (III) (wherein R 2 is as defined above), or a salt or Zwitterion thereof. The process is of value as a means of preparing the antibiotic ceftazidime. Intermediates of value in the process and of methods of preparing them are also disclosed.
摘要:
The invention provides crystalline (Z)-2-(2-t-butoxycarbonyl-prop-2-oxyimino)-2-(2-triphenylmethylaminothia- zol-4-yl)acetic acid in association with dioxan and its crystalline ethyl ester in association with methanol. The compounds are of value as intermediates in the preparation of β-lactam antibiotics such as ceftazidime or azthreonam.
(where R' is a carboxyl group, a group COO ⊖ or a blocked carboxyl group; R 2 is an amino or protected amino group; and R is hydrogen or a group of the formula CH 2 X, where X represents a halogen atom, a hydroxyl group, an acetoxy group; a group of the formula O.CO.NHR 3 , where R 3 is hydrogen, a C 1-4 alkyl group optionally substituted by 1 to 3 halogen atoms or an N-protecting group; a group of the formula OR 4 , where R" is a C 1-4 alkyl group optionally substituted by halogen or a C 1-4 alkoxy group; or a pyridinium, 3-carbamoylpyridinium or 4-carbamoyl-pyridinium group; B is -S- or -SO- (a- or β-); and the dotted line bridging the 2-, 3- and 4- positions indicates that the compound is a ceph-2-em or ceph-3-em compound) and salts thereof, the compounds of formula (I) being associated with an anion when X represents a pyridinium, 3-carbamoylpyridinium group or a 4-carbamoylpyridinium group and R' is other than COO ⊖ ) are disclosed. Processes for their preparation and pharmaceutical compositions containing them are also disclosed.