描述了类似物1(CC-1065)及其与抗体的结合物的磷酸盐前药的合成和生物学评估。1,2,9,9a-四氢环丙烷[ c ]苯并[ e化合物的] indol-4-one(CBI)部分赋予其在水溶液中增强的溶解度和稳定性。在磷酸酶存在下,这些化合物转化为活性DNA烷基化剂。通过将CBI与双吲哚基部分偶合,然后连接含硫醇的连接基,并将CBI的羟基转化为磷酸酯前药,依次实现前药的合成。结合到前药中的接头使得在含有少至5%有机助溶剂的水性缓冲溶液中,可以通过稳定的二硫键或硫醚键与抗体偶联,从而产生单体和稳定的抗体-细胞毒性前药偶联物。在抗体缀合物中使用了两个在空间位阻上不同的含二硫键的接头,以测试不同速率的细胞内二硫键裂解和效应物释放对生物活性的影响。前药可通过内源磷酸酶的作用转化为活性细胞毒性化合物。抗体-前药结合物在体外和体内均显示出有效的抗原选择性细胞毒活性。
CHEMICAL LINKERS AND CLEAVABLE SUBSTRATES AND CONJUGATES THEREOF
申请人:Sufi Bilal
公开号:US20100145036A1
公开(公告)日:2010-06-10
The present disclosure provides drug-ligand conjugates and drug-cleavable substrate conjugates that are potent cytotoxins. The disclosure is also directed to compositions containing the drug-ligand conjugates, and to methods of treatment using them.
Methods and Compounds For Preparing Cc-1065 Analogs
申请人:Gangwar Sanjeev
公开号:US20080281102A1
公开(公告)日:2008-11-13
A method of forming a CBI CC-1065 analog utilizes NH2 as a starting material, where R3 is H or alkyl and R6 is H, substituted or unsubstituted lower alkyl, cyano, or alkoxy. Intermediates (I) are used and are claimed.