Hydrophobic cis-platinum complexes efficiently incorporated into

Details Hydrophobic cis-platinum complexes efficiently incorporated into Hydrophobic cis-platinum complexes efficiently incorporated into

1991-05-31

1993-01-12

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Liposomes

514492, 556136, 556137, A61K 3147

Patent

active

051788764

ABSTRACT:
The present invention involves the synthesis and use of new platinum compounds. These new platinum compounds are easy to encapsulate in liposomes at high efficiencies. They are further characterized as platinum (II) four coordinate complex having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are carboxylato monoanions bearing a hydrophobic radical function or a single carboxylato dianion bearing a hydrophobic radical function and R.sub.3 is a vicinal diaminoalkane or vicinal diaminocycloalkane. The complex is substantially soluble in methanol or chloroform and substantially insoluble in water. Said complex may be incorporated into phospholipid liposomes. Such platinum complexes encapsulated in phospholipid liposomes are useful for chemotherapy of platinum complex-sensitive tumors.

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