Methotrexate analogs. 22. Synthesis, dihydrofolate reductase affinity, cytotoxicity, and in vivo antitumor activity of some putative degradation products of methotrexate-poly(L-lysine) conjugates
作者:Andre Rosowsky、Ronald A. Forsch、James H. Freisheim、John Galivan、Michael Wick
DOI:10.1021/jm00373a014
日期:1984.7
and their antitumor activity in vivo. These small lysine derivatives of MTX are of interest as putative breakdown products of MTX-poly(L-lysine). Inhibition of DHFR in a cell-free assay was decreased only 3-fold relative to MTX, indicating that gamma-substitution by up to three lysines is well tolerated for binding. On the other hand, toxicity toward L1210murineleukemia cells in culture decreased up
Methotrexate analogs. 21. Selective cleavage of 2-(trimethylsilyl)ethyl esters in the presence of N-tert-butyloxycarbonyl groups during the synthesis of protected dilysine and trilysine derivatives of methotrexate