We report herein eleven 2′-N-acyl derivatives that were prepared from ecteinascidin 770 (Et 770: 1b) via 18,6′-O-bisallyl protected compound (4) in excellent yields. 2′-N-Acyl derivatives (6a–k) generally showed higher cytotoxicity than 1b. Among them, 3-quinolineacyl derivative (6g) and 4-fluorocinnamoyl derivative (6h) exhibited approximately 50- and 70-fold higher cytotoxicity to the HCT116 human colon carcinoma cell line, respectively, than 1b. Both compounds are potent inhibitors of the in vitro growth of several tumor cells and are therefore promising leads for further optimization. We also report the transformation of 1b into Et 788 (3), which is the first example of an ecteinascidin derivative having a primary amide at C-21 position.
我们在此报告了 11 种 2′-N-acyl 衍
生物,它们是通过 18,6′-O
双烯丙基保护化合物 (4) 以极好的产率从表矢车菊素 770(Et 770:1b)制备的。2′-N-Acyl 衍
生物(6a-k)的细胞毒性普遍高于 1b。其中,3-
喹啉酰基衍
生物(6g)和 4-
氟肉桂酰基衍
生物(6h)对 HCT116 人结肠癌细胞株的细胞毒性分别比 1b 高出约 50 倍和 70 倍。这两种化合物都是几种肿瘤细胞体外生长的强效
抑制剂,因此是有望进一步优化的线索。我们还报告了将 1b 转化为 Et 788 (3)的过程,这是首个在 C-21 位具有伯
氨基的表雏菊苷衍
生物实例。