cembrene C 以
氯仿 为溶剂,
反应 240.0h,
以46%的产率得到(7E,11E)-(1S,3aR,12aS)-11-Isopropyl-1,8-dimethyl-4-methylene-1,2,3,3a,4,5,6,9,10,12a-decahydro-cyclopentacycloundecen-1-ol
参考文献:
名称:
Stereochemical course of the transannular cyclization, in chloroform, of epoxycembranoids derived from the geometrical isomers of (14S)-14-hydroxy-1,3,7,11-cembratetraenes
Cembrene- C (1), a natural occurring cembrane hydrocarbon diterpene, was prepared from farnesyl acetate (3) via four steps in 21% overall yield by titanium-induced macrocyclization as the key step.
Marine terpenes and terpenoids. VII. Minor cembranoid derivatives, structurally related to the potent anti-tumor-promoter sarcophytol A, from the soft coral Sarcophyton glaucum.
作者:Masaru KOBAYASHI、Katsunori OSABE
DOI:10.1248/cpb.37.631
日期:——
Eight new cembranoids, sarcophytol M (3), sarcophytol N (9a), sarcophytol J (11a), sarcophytol H and its diacetate (15a and 15b), sarcophytol O (18), sarcophytol I (19a) and sarcophytol G (24a), and known cembranoids nephthenol (7) and sinulariol D (8), were isolated from the soft coral Sarcophyton glaucum.Their structures were determined from the spectroscopic properties and by chemical conversion.Sarcophytol M (3) was found to be the enantiomer of the known compound cembrenol from a terrestrial plant.Sarcophytol N (9a) and sarcophytol J (11a) were the geometrical isomers at C-3 of the major components sarcophytol A (1a) and sarcophytol B (2a), which are potent anti-tumor-promoters.Sarcophytol H and sarcophytol O were identical with the diols 15a and 18, respectively, which were previously synthesized from 1a.Sarcophytol I (19a) and sarcophytol G (24a) were the diastereoisomers of the known compounds sarcophytol E (22a) and sarcophytol D (21a), respectively, and their absolute configurations were determined by chemical conversion of two 11, 12E-epoxides (20 and 23).
八种新西松烷类化合物:肌醇 M (3)、肌醇 N (9a)、肌醇 J (11a)、肌醇 H 及其二乙酸酯(15a 和 15b)、肌醇 O (18)、肌醇 I (19a) 和肌醇 G (24a) 、以及已知的西松烷类化合物 nephthenol (7) 和 Sinulariol D (8),是从软珊瑚 Sarcophyton glaucum 中分离出来的。它们的结构是通过光谱特性和化学转化确定的。Sarcophytol M (3) 被发现是其对映体来自陆地植物的已知化合物西柏烯醇。 Sarcophytol N (9a) 和 sarcophytol J (11a) 是主要成分 sarcophytol A (1a) 和 sarcophytol B (2a) 的 C-3 几何异构体,它们具有有效的抗肿瘤作用Sarcophytol H 和 sarcophytol O 分别与之前从 1a 合成的二醇 15a 和 18 相同。 Sarcophytol I (19a) 和 sarcophytol G (24a) 是已知化合物 sarcophytol E (22a) 和 sarcophytol 的非对映异构体D (21a) 分别,其绝对构型通过两种 11、12E-环氧化物(20 和 23)的化学转化确定。
KOBAYASHI, MASARU;OSABE, KATSUNORI, CHEM. AND PHARM. BULL., 37,(1989) N, C. 631-636
作者:KOBAYASHI, MASARU、OSABE, KATSUNORI
DOI:——
日期:——
KOBAYASHI, MASARU;NAKANO, EMIKO, J. ORG. CHEM., 55,(1990) N, C. 1947-1951
作者:KOBAYASHI, MASARU、NAKANO, EMIKO
DOI:——
日期:——
Bowden, Bruce F.; Coll, John C.; Mitchell, Sarah Jane, Australian Journal of Chemistry, 1980, vol. 33, # 4, p. 879 - 884
作者:Bowden, Bruce F.、Coll, John C.、Mitchell, Sarah Jane
DOI:——
日期:——
A Convenient Synthesis of Cembrene–C
作者:Ying Li、Weodong Li、Yulin Li
DOI:10.1080/00397919408012651
日期:1994.3
Cembrene- C (1), a natural occurring cembrane hydrocarbon diterpene, was prepared from farnesyl acetate (3) via four steps in 21% overall yield by titanium-induced macrocyclization as the key step.