Medium-ring ethers of various structural types have been isolated from marine organisms. 1 While medium-ring ethers such as the ladder ether toxins have important implications with regard to their biological impact, it is the exquisite structures of naturally occurring medium-ring ethers that has provoked the imagination of synthetic chemists. Because eight-membered cyclic ethers are more prevalent
已从海洋
生物中分离出各种结构类型的中
环醚。1 虽然梯形醚毒素等中
环醚对其
生物学影响具有重要意义,但正是天然存在的中
环醚的精致结构激发了合成
化学家的想象力。由于八元
环醚更为普遍,因此设计了许多独特而有趣的构造方法。2 九元醚可能不太常见,但存在于梯形毒素 brevetoxin A、3 雪卡毒素、4 冈比亚酸 A、5 eucellins、6