申请人:Taiho Pharmaceutical Co., Ltd.
公开号:USRE036477E1
公开(公告)日:1999-12-28
Benzoic acid derivatives represented by the formula (I): ##STR1## wherein R.sub.1 represents hydrogen or lower-alkyl, R.sub.2 and R.sub.4 represent hydrogen, trimethylsilyl, or trimethylgermyl, R.sub.3 represents hydrogen, lower-alkyl, trimethylsilyl, or trimethylgermyl, R.sub.5 represents hydrogen, lower-alkyl, acetyl, or hydroxy, at least one of R.sub.2 and R.sub.3 being trimethylsilyl or trinethylgermyl, and R.sub.6 means hydroxy, lower-alkoxy, or a group of the formula --NR.sub.7 R.sub.8, wherein R.sub.7 and R.sub.8 mean hydrogen or lower-alkyl, and X represents a group of the formula --CONH--, --NHCO--, --COO--, --OCO--, --COCH.dbd.CH--, --COCH.dbd.C(OH), or --CH.dbd.CH--, which exhibit excellent effect as differentiation-inducing agents for neoplastic cells, especially leukemia cells, or a therapeutic agent for psoriasis or immune and inflammatory diseases, and a process for the preparation thereof, are disclosed.
公开了化学式(I)所代表的苯甲酸衍生物:其中R.sub.1代表氢或低碳基,R.sub.2和R.sub.4代表氢,三甲基硅基或三甲基锗基,R.sub.3代表氢,低碳基,三甲基硅基或三甲基锗基,R.sub.5代表氢,低碳基,乙酰基或羟基,其中至少一个R.sub.2和R.sub.3是三甲基硅基或三甲基锗基,R.sub.6代表羟基,低碳氧基或公式--NR.sub.7R.sub.8的基团,其中R.sub.7和R.sub.8代表氢或低碳基,X代表公式--CONH--,--NHCO--,--COO--,--OCO--,--COCH.dbd.CH--,--COCH.dbd.C(OH)或--CH.dbd.CH--的基团,这些化合物表现出优异的诱导肿瘤细胞分化的作用,特别是对白血病细胞,或治疗银屑病或免疫和炎症性疾病的治疗剂,并公开了其制备方法。