Marine natural products. XVII Nephtheoxydiol, a new cytotoxic hydroperoxy-germacrane sesquiterpene, and related sesquiterpenoids from an Okinawan soft coral of Nephthea sp. (Nephtheidae).
作者:ISAO KITAGAWA、ZHENG CUI、BYENG WHA SON、MOTOMASA KOBAYASHI、YOSHIMASA KYOGOKU
DOI:10.1248/cpb.35.124
日期:——
A new cytotoxic hydroperoxy-germacrane sesquiterpene named nephtheoxydiol (8) and several related sesquiterpenoids, ent-oplopanone (2), nephthenol (6), and nephthediol (9), were isolated from an Okinawan soft coral of Nephthea sp. (Nephtheidae), together with a new cadinanetype sesquiterpene named nephthene (17). Based on chemical reactions and physical data analyses, the absolute stereostructures of entt-oplopanone (2), nephthenol (6), nephtheoxydiol (8), nephthediol (9), and nephthene (17) have been determined as (+) -oplopanone (2), (4R, 7S)-germacra-1 (10) E, 5E-dien-4-ol (6), (1S, 4R, 7S)-1-hydroperoxygermacra-5E, 10 (15)-dien-4-ol (8), (1S, 4R, 7S) -germacra-5E, 10 (15) -diene-1, 4-diol (9), and (1S, 7R, 10S) -cadina-4 (14), 5-diene (17), respectively.
从冲绳软珊瑚Nephthea sp.(Nephtheidae)中分离出一种新的细胞毒性过氧化氢-革兰氏倍半萜,命名为nephtheoxydiol(8),以及几种相关的倍半萜,ent-oplopanone(2)、nephthenol(6)和nephthediol(9),还有一种新的cadinanetype倍半萜,命名为nephthene(17)。根据化学反应和物理数据分析,确定了entt-oplopanone (2)、nephthenol (6)、nephtheoxydiol (8)、nephthediol (9) 和 nephthene (17) 的绝对立体结构为 (+) -oplopanone (2)、(4R, 7S)-germacra-1 (10) E, 5E-dien-4-ol (6)、(1S, 4R, 7S)-1-hydroperoxygermacra-5E, 10 (15)-dien-4-ol (8)、(1S, 4R, 7S)-germacra-5E, 10 (15) -diene-1, 4-diol (9)和 (1S, 7R, 10S)-cadina-4 (14), 5-diene(17)。