摘要:
Thermally stabilized compositions of halogen-containing resins may be obtained by addition to the resin of a stabilizing agent of N.sup..omega.-higher alkyl or higher aliphatic acyl basic amino acid chelates of divalent metals or a mixture of or precursory ingredients thereof which is capable of forming N.sup..omega.-higher alkyl or higher aliphatic acyl-basic amino acid chelates when heated at the usual processing temperature of the halogen-containing resin.
摘要:
An improved process for the production of 5-amino-1,2,4-thiadiazol-3-yl-(2-(lower)-alkoxyimino)acetic acids starting from 5-substituted- or unsubstituted-3-aminoisoxazole compounds is disclosed herein. The title compounds are useful as acylating agents for the production of 7-acylaminocephalosporins.
摘要:
An improved process for the production of 5-amino-1,2,4-thiadiazol-3-yl-(2-(lower)-alkoxyimino)acetic acids starting from 5-substituted- or unsubstituted-3-amino-isoxazole compounds is disclosed herein. The title compounds are useful as acylating agents for the production of 7-acylaminocephalosporins.
摘要:
A 2-chloro-4,5-difluorobenzoyl compound of the formula: ##STR1## wherein R.sup.2 is a lower alkyl group, and R.sup.7 is a 2,4-difluorophenyl group or a 4-fluorophenyl group.
摘要:
A mixed acid anhydride consisting of higher fatty acid having 6 to 22 carbon atoms and sulfuric anhydride is reacted with amino acids, peptides or proteins in the presence of a base to form N-higher aliphatic acyl derivatives of amino acids, peptides or proteins respectively in good yield. The reaction mixture comprises N-acylated-amino acids, peptides or -proteins and sulfate salts and may be directly used as detergent.