Synthesis and antitumor activity of 7-substituted 20(RS)-camptothecin analogues
摘要:
Novel water-soluble camptothecin analogues with excellent antitumor activity have been designed and synthesized by total synthesis. The analogues were evaluated for cytotoxic activity against five tumor cell lines. The most potent analogue 6c exhibited significant antitumor activity at wider range of doses as compared with camptothecin (T/C 243 % at 70mg/kg; T/C > 150% at 8.75-140mg/kg). Copyright (C) 1996 Elsevier Science Ltd
Intermediates for the synthesis of camptothecin derivatives
申请人:Chong Kun Dang Corp.
公开号:US06177568B1
公开(公告)日:2001-01-23
Intermediates for the synthesis of camptothecin of the formula II
wherein:
R1 is —(CH2)2NR1R2, where R1 is an amino protecting group and R2 is C2-C5 alkyl, hydroxyethyl or acetoxyethyl group, and of the formula III
wherein:
n is 1 or 2;
R3 is hydrogen or —OR4, where R4 is hydrogen, —COR5, —CONHR6 or CH2OR7, where R5 is methyl or —CH2OCH3, R6 is isopropyl, phenyl or —CH2CH2Cl, and R7 is methyl, ethyl or —CH2CH2OCH3; with the proviso that when n is 2, R3 is not hydrogen.
Camptothecin compounds and a method of preparation thereof
申请人:Chong Kun Dang Corp.
公开号:US06265413B1
公开(公告)日:2001-07-24
Camptothecin derivatives and pharmaceutically acceptable salts thereof, its manufacturing method and an antineoplastic agent containing it. The camptothecin derivatives are modified in B-ring and E-ring and show improved water solubility and enhanced antineoplastic effect.