EP0296122B1 — Cyclosporins and their use as pharmaceuticals

USPTO Abstract

Cyclosporins wherein the residue at the 1-position (typically -MeBmt- or -dihydro-MeBmt-) is 3 min O-acylated or 3 min -oxo or -C1-4alkoxyimino substituted, or wherein the residue at the 2-position is beta -O-acyl or beta -oxo substituted, or wherein the residue at the 2-position is -Ile-, or wherein the residue at the 11-position is -MeAla-, -MeIle- or -MealloIle- as well as various naturally occurring cyclosporins/dihydro-derivatives thereof, are useful in reversing resistance to chemotherapy, in particular resistance to cytostatic or anti-neoplastic therapy. Various of these cyclosporins and intermediates for their production are novel. Intermediates wherein the residue (e.g. -MeBmt-, -dihydro-MeBmt- etc.) at the 1-position is 8 min -alkoxy of 7 min -desmethyl-7 min -hydrocarbyl substituted are novel and useful as immunosuppressants, anti-inflammatory and anti-parasitic agents.