Process for preparing distamycin derivatives

摘要

It is described a process for preparing, in high yields and purity and without the need of carrying out several steps and/or isolating many intermediates which could lead to undesired by-products, a distamycin derivative of formula wherein R is a bromine or chlorine atom; or a pharmaceutically acceptable salt thereof. The compounds of formula (I) are useful in therapy as antitumor agents.