An effective synthesis of analogs of the indole phytoalexin cyclobrassinin with NR1R2 group instead of SCH3 was developed starting from indole-3-carboxaldehyde. The target compounds were prepared by spirocyclization of 1-Boc-thioureas with the formation of isolable spiroindoline intermediates, followed by the trifluoroacetic acid-induced cascade reaction consisting of methanol elimination, deprotection
从吲哚-3-羧醛开始,开发了具有NR 1 R 2基团而不是SCH 3的吲哚植物抗毒素环油菜素类似物的有效合成方法。通过1-Boc-硫脲的螺环化并形成可分离的螺二氢吲哚中间体,然后进行三氟乙酸诱导的级联反应,包括甲醇消除,脱保护和亚氨基离子的重排,来制备目标化合物。1 H和13阐明了新颖产品的结构C NMR光谱,包括HMBC,HSQC,COSY,NOESY和DEPT测量。相对于非恶性HUVEC细胞,几种新合成的化合物显示出对人白血病和实体瘤细胞系的显着抗增殖/细胞毒活性,以及这些对癌细胞的显着选择性。