The isolation and structure determination of the "cybrodins", a new group of sesquiterpenoids produced by a new strain of the bird's nest fungus Cyathus bulleri, is reported. Cybrodol (3), isocybrodol (4), cybrodal (5), trisnorcybrodolide (6), and cybrodic acid (7) may be classified as seco-illudalane sesquiterpenes. The evidence leading to the structural assignments is presented, along with chemical correlations among the cybrodins. The possible mode of biogenesis is discussed. Pterosin-C (13), a known norsesquiterpene, and 3-methyllumichrome (17) were also isolated. Small quantities of a new sesquiterpenoid, broderol, believed to possess structure 21, were obtained on two occasions.
报道了一种新的鸟巢真菌Cyathus bulleri产生的一类新的
倍半萜化合物“cybrodins”的分离和结构鉴定。Cybrodol(3)、isocybrodol(4)、cybrodal(5)、trisnorcybrodolide(6)和cybrodic acid(7)可以归类为sec-illudalane
倍半萜类化合物。提出了导致结构赋值的证据,以及cybrodins之间的
化学相关性。讨论了可能的
生物合成方式。此外,还分离出了已知的一种新的无
萜类倍半萜化合物Pterosin-C(13)和3-
甲基琥珀酸(17)。在两次实验中,还获得了一种被认为具有结构21的新的少量
倍半萜化合物broderol。