Studies concerning the antibiotic actinonin. Part IV. Synthesis of structural analogues of actinonin by the mixed anhydride method
作者:Barbara J. Broughton、Peter J. Warren、Kenneth R. H. Wooldridge、Derek E. Wright、W. David Ollis、Ronald J. Wood
DOI:10.1039/p19750000842
日期:——
The reaction between alkylsuccinic anhydrides (III) and O-benzylhydroxylamine yields the acids (VI). These acids (VI) may be coupled with amino-amides (II) by the mixed anhydride procedure, giving a mixture of the racemates (VIII) and (IX). Hydrogenolysis of the O-benzylhydroxamic acids (VIII) and (IX) yields structuralanalogues [(X) and (XI)] of the natural antibioticactinonin (I).
Studies concerning the antibiotic actinonin. Part VI. Synthesis of structural analogues of actinonin by dicyclohexylcarbodi-imide coupling reactions
作者:John P. Devlin、W. David Ollis、John E. Thorpe、Derek E. Wright
DOI:10.1039/p19750000848
日期:——
dicarboxylic acids has been investigated as a route for the specific synthesis of structural analogues (II) and (III) of actinonin (XVII). Methods for the synthesis of the isomers (X) and (XI) have been developed, but their coupling with amino-amides (I) by use of dicyclohexylcarbodi-imide is not specific.
Studies concerning the antibiotic actinonin. Part III. Synthesis of structural analogues of actinonin by the anhydride–imide method
作者:John P. Devlin、W. David Ollis、John E. Thorpe、Ronald J. Wood、Barbara J. Broughton、Peter J. Warren、Kenneth R. H. Wooldridge、Derek E. Wright
DOI:10.1039/p19750000830
日期:——
A synthetic route, associated with a high degree of stereoselectivity, has been developed for the synthesis of structuralanalogues (XIII) of actinonin (I). The anhydride–imide method involves the sequence (IIIb)+(V)→[(VI)+(VII)]→(XI)→(XIII). (±)-Amino-amides (IIIb) yielded the (±)-hydroxamic acids with the relative configuration (XIII) and L-amino-amides (X) yielded single enantiomers with the absolute