Acylation of cis,trans,cis-PtIV(RNH2)(NH3)(OH)2Cl2 with acetic anhydride afforded complexes cis,trans,cis-PtIV(RNH2)(NH3)(OAc)2Cl2, where R is 2,2,6,6-tetramethyl-1-oxylpiperidin-4-yl (1b) or 2,2,5,5-tetramethyl-1-oxylpyrrolidin-3-yl (2b). The complexes were characterized by elemental analysis, HPLC, and IR, UV, and ESR spectra. Complex 1b exhibits high antitumor activity comparable with that of Cisplatin against leukemia P388 used as the experimental tumor. Simultaneous administration of low doses of 1b and Cisplatin (1/20 of LD50 each) results in synergism of the antitumor activity and 100% cure of animals.
顺式、反式、顺式-PtIV(RNH2)(NH3)(OH)2Cl2与
乙酸酐的酰化反应生成顺式、反式、顺式-PtIV(RNH2)(NH3)(OAc)2Cl2的络合物,其中R为2,2,6,6-四甲基-1-氧代
哌啶-4-基(1b)或2,2,5,5-四甲基-1-氧代
吡咯烷-3-基(2b)。通过元素分析、HPLC、IR、UV和ESR光谱对络合物进行表征。络合物1b表现出与
顺铂相当的抗肿瘤活性,可用于治疗白血病P388。同时给予低剂量的1b和
顺铂(各为LD50的1/20)可产生协同抗肿瘤活性,并使动物100%治愈。