Totalsynthesis of modified pentapeptide, caldoramide, a cytotoxic linear pentapeptide from the marine cyanobacterium Caldora penicillate is described. Notable features of the route include the efficient preparation of three key fragments and final assembly to the natural product via sequential amide couplings. The spectral data of the synthetic compound was found to be in comparison with that of the
Trungapeptin A, a novel cyclodepsipeptide isolated from a marine cyanobacterium (Lyngbya majuscula), has been synthesised and its structure unambiguously confirmed.
从海洋蓝藻(Lyngbya majuscula)中分离出的新型环表肽 Trungapeptin A 已被合成,其结构也已得到明确证实。