摘要:
Novel diacyl penicillins of the formula ##EQU1## wherein R is alkyl, cycloalkyl, aryl, aralkyl, phenoxyalkyl, heterocyclic carboxyl excepting isoxazole carboxyl derivatives, or ##SPC1##In which benzene ring A may optionally be substituted andB represents a protective group for the amino group, and X is a protective group for the carboxyl group, are produced by reacting a benzyl penicillin ester of the formula ##EQU2## wherein X is as defined above, with a chlorinating agent in the presence of tertiary organic base to obtain an imide chloride group-incorporated compound of the formula ##EQU3## and then reacting the compound of the last-named formula with carboxylate of the formulaR-COOM (IV)wherein M is a metal atom, and R is as defined above.
摘要:
This invention relates to new penicillin derivatives and methods for preparing the same, said derivatives having the structure
and
wherein Z is hydrogen, lower alkyl or a salt forming ion and R is aryl, substituted aryl, lower alkyl or cycloalkyl. These compounds are useful as antibacterial agents.
摘要:
3-(2-(Thioacylthio)alkanamido)-1,4-(cyclo-(1''carboxy)alkylenethio)azetidin-2-one derivatives possessing antibacterial activity are produced by the reaction of a carbodithioic acid 1-carboxy(lower)alkyl ester and a 3-amino-1,4(cyclo(1''-carboxy)alkylenethio)azetidin-2-one derivative in the presence of a condensing agent.
摘要:
This invention relates to new penicillin derivatives and methods for preparing the same, said derivatives having the structure
WHEREIN Z is hydrogen, lower alkyl or a salt forming ion and R is aryl, substituted aryl, lower alkyl or cycloalkyl. These compounds are useful as antibacterial agents.
摘要:
New vinylaminoacetylpenicillins and vinylaminoacetyl cephalosporins have the formula A is the 6-aminopenicillanic acid moiety and certain derivatives thereof or the 7-aminocephalosporanic acid moiety and certain derivatives thereof. R1 is -CN or -COR5. R2 is -CN, -COR5, -SO2R6 or -PO(R7)2. R3 is hydrogen, lower alkyl, phenyl, hydroxyphenyl, thienyl, furyl or pyridyl. R5, R6 and R7 each is lower alkoxy or phenyl. These products are useful as antibacterial agents.
摘要:
Penicillin esters are produced by reacting penicillin derivatives with organic sulfonylhalides and organic hydroxy compounds in the presence of an acid-binding agent.
摘要:
New esters of Alpha -aminopenicillins having the formula
WHEREIN R is C2-C7 alkyl;
WHEREIN R2 H or OH, R3 H or halogen;
WHEREIN R1 is
OR -CH2NHCOO-R4 wherein R4 C1-C4 alkyl; R5 H, CH3 or C2H5, useful as active ingredients of pharmaceutical preparation; processes for their preparation; chemical intermediates useful in said preparation; and methods for the treatment of infectious diseases.
摘要:
A method for preparing Alpha -aminobenzylpenicillin consisting of acylating a derivative of 6-aminopenicillanic acid, for example from an acylal derivative having the general formula
WHERE R'' is an alkyl C1-C4 group, an alkyl halide, aryl or aralkyl groups with an activated ester of N-substituted D(-) Alpha -amino phenylacetic acid having the general formula
AND X is either hydrogen, or 2-pyrimidyl, in an organic solvent medium with subsequent hydrolysis.
摘要:
WHEREIN R1 is lower alkyl, cycloalkylmethyl, cycloalkenylmethyl, cycloalkadienylmethyl, aryloxymethyl, aralkyl, certain heterocyclic groups; and certain substituted members of such groups; R2 is hydrogen, lower alkyl, phenyl or phenyl-lower alkyl and R3 is lower alkyl, lower alkenyl, aryl or aralkyl. They are useful as antibacterial agents.
New acylthiomethyl esters of penicillins have the formula