A synthetic approach to poly(.gamma.-glutamyl) conjugates of methotrexate
作者:James R. Piper、George S. McCaleb、John A. Montgomery
DOI:10.1021/jm00356a035
日期:1983.2
one added glutamate unit. Key steps in the sequence are the peptide coupling of N-[4-[[(benzyloxy)carbonyl]-methylamino]benzoyl]-L-glutamicacid alpha-benzyl ester (5) with oligo(gamma-L-glutamate) benzyl esters, removal of blocking groups by catalytic hydrogenolysis, and introduction of the (2,4-diamino-6-pteridinyl)methyl grouping by alkylation with 6-(bromomethyl)-2,4-pteridinediamine hydrobromide