Tryprostatin A 1和B 2是基于吲哚生物碱的真菌产物,在细胞周期的G2 / M期起作用。Tryprostatin A和B以及它们的两个对映异构体和四个非对映异构体是通过共同的策略合成的。作为细胞毒性的量度,测定了这八种立体异构体在人乳腺癌,前列腺癌和肺癌细胞系中的生长抑制特性。还检查了胰蛋白酶抑制素和胰蛋白酶抑制素立体异构体诱导拓扑异构酶II介导的DNA松弛或抑制微管蛋白聚合的能力。尽管没有一种立体异构体在基于拓扑异构酶II或微管蛋白的测定中具有显着活性,但是在所检查的人类癌细胞系中,ds2-try B 11表现出比依托泊苷3更有效的细胞毒性。此外,
Total synthesis of tryprostatin A and B as well as their enantiomers
作者:Shuo Zhao、Tong Gan、Peng Yu、James M. Cook
DOI:10.1016/s0040-4039(98)01466-x
日期:1998.9
The 3-methylindoles 3a, 3b were converted into tryprostatin A (1a), B (1b) and their enantiomers 2a, 2b via prenylation at the indole 2-position by generation of the required 2-lithioindole derivatives (from 7a, 7b), followed by alkylation.
The 3-methyl-6-methoxyindole 3 was converted into tryprostatin A (1) via a regiospecific bromination process coupled with the Schöllkopf chiral auxillary 7 to provide the 2-bromo-6-methoxy-tryptophan 8a as a key intermediate.