Thioalkylthio cephalosporin derivatives and intermediates
申请人:SHIONOGI SEIYAKU KABUSHIKI KAISHA
trading under the name of
SHIONOGI & CO. LTD.
公开号:EP0594263A1
公开(公告)日:1994-04-27
Novel compounds of the formula I:
QSR²SR¹Het
wherein Q is C₁-C₁₂ acyl or halogen; R¹ is a single bond or C₁-C₄ alkylene; and R² is a straight or branched C₁-C₄ alkylene; Het is 1,2,3-triazol-4-yl, or a derivative which is optionally protected at a nitrogen atom.
The novel compounds are useful as intermediates for the production of thioalkylthio cephalosporin antibiotic compounds.
INTERMEDIATES FOR THE PREPARATION OF THIOALKYLTHIO CEPHALOSPORIN DERIVATIVES
申请人:SHIONOGI SEIYAKU KABUSHIKI KAISHA
trading under the name of
SHIONOGI & CO. LTD.
公开号:EP0594263B1
公开(公告)日:1999-06-09
US5214037A
申请人:——
公开号:US5214037A
公开(公告)日:1993-05-25
US5352792A
申请人:——
公开号:US5352792A
公开(公告)日:1994-10-04
Producing Z-isomer of hydrogen bromide salt of 2-aminothiazole derivative
申请人:Sumitomo Chemical Co., Ltd.
公开号:US06340763B1
公开(公告)日:2002-01-22
There is disclosed a process for producing an acid salt of a (Z)-2-aminothiazole compound of the formula (I):
wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, Y represents a halogen atom, —OSO3H or —OPO(OH)2,
m indicates the valence number of an inorganic acid of the formula:
HY wherein Y represents the same as defined above, and
n indicates an integer of 1 or 2,
which process is characterized by:
reacting an acid salt of a 2-aminothiazole compound of the formula (II):
wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, X represents a bromine atom or an iodine atom, and the wavy line means that this compound is a mixture of the E- and Z-isomers, with the inorganic acid of the formula HY.