中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-morpholin-4-ylmethyl-3-trifluoromethylbenzoic acid methyl ester | 1616670-52-0 | C14H16F3NO3 | 303.281 |
4-甲基-3-(三氟甲基)苯甲酸 | 4-methyl-3-(trifluoromethyl)benzoic acid | 261952-01-6 | C9H7F3O2 | 204.149 |
3-(三氟甲基)-4-甲基苯甲酸甲酯 | methyl 4-methyl-3-(trifluoromethyl)benzoate | 116419-94-4 | C10H9F3O2 | 218.175 |
4-(溴甲基)-3-(三氟甲基)苯甲酸甲酯 | methyl 4-(bromomethyl)-3-(trifluoromethyl)benzoate | 863248-28-6 | C10H8BrF3O2 | 297.072 |
c-KIT is a promising therapeutic target against gastrointestinal stromal tumor (GIST). In order to identify novel c-KIT inhibitors capable of overcoming imatinib resistance, we synthesized 31 novel thiazolo[5,4-b]pyridine derivatives and performed SAR studies. We observed that, among these substances, 6r is capable of inhibiting significantly c-KIT and suppressing substantially proliferation of GIST-T1 cancer cells. It is of note that 6r is potent against a c-KIT V560G/D816V double mutant resistant to imatinib. Compared with sunitinib, 6r possesses higher differential cytotoxicity on c-KIT D816V Ba/F3 cells relative to parental Ba/F3 cells. In addition, kinase panel profiling reveals that 6r has reasonable kinase selectivity. It was found that 6r remarkably attenuates proliferation of cancer cells via blockade of c-KIT downstream signaling, and induction of apoptosis and cell cycle arrest. Furthermore, 6r notably suppresses migration and invasion, as well as anchorage-independent growth of GIST-T1 cells. This study provides useful SAR information for the design of novel c-KIT inhibitors overcoming imatinib-resistance.