Synthesis of yomogin using a telescoped α-methylene-γ-butyrolactone annelation procedure
摘要:
A novel and efficient synthetic route to the anti-cancer natural product yomogin has been developed using a Telescoped Intramolecular Michael-Olefination (TIMO) sequence as the key step. Two variants of the TIMO sequence have been used successfully: a two-step acylation approach using diethyl phosphonoacetic acid and a base-free variant using triphenylphosphoranylideneketene (Bestmann's ylide). The natural product, 3-oxodiplophyllin, was also prepared en route to yomogin. (C) 2010 Elsevier Ltd. All rights reserved.
Synthesis of yomogin using a telescoped α-methylene-γ-butyrolactone annelation procedure
摘要:
A novel and efficient synthetic route to the anti-cancer natural product yomogin has been developed using a Telescoped Intramolecular Michael-Olefination (TIMO) sequence as the key step. Two variants of the TIMO sequence have been used successfully: a two-step acylation approach using diethyl phosphonoacetic acid and a base-free variant using triphenylphosphoranylideneketene (Bestmann's ylide). The natural product, 3-oxodiplophyllin, was also prepared en route to yomogin. (C) 2010 Elsevier Ltd. All rights reserved.
Eudesman-12,8β-olides and other terpenes from Artemisia species
作者:Harald Greger、Christa Zdero、Ferdinand Bohlmann
DOI:10.1016/0031-9422(86)80022-x
日期:——
already known terpenes, eleven new cudesmanolides whereas four new guaianolides were found in A. gmelinii. No sesquiterpenelactones were detected in the aerial parts of A. santolinifolia which afforded two new nerolidol derivatives besides several other already known compounds. From A. caerulescens var. cretacea six eudesmanolides were isolated, one of which has not been reported previously. The structures
摘要 Artemisia iwayomogi 的地上部分除了已知的萜烯外,还提供了 11 种新的 cudesmanolides,而在 A. gmelinii 中发现了 4 种新的愈创木酚内酯。在 A. santolinifolia 的地上部分未检测到倍半萜内酯,除了几种其他已知化合物外,这还提供了两种新的橙花醇衍生物。来自 A. caerulescens var。白垩纪中分离出六种eudesmanolides,其中一种以前没有报道过。通过高场1H NMR光谱和化学转化阐明了结构。简要讨论了 Abrotanum 和 Seriphidium 亚属中倍半萜内酯的化学分类学意义。
Laatsch, Hartmut, Liebigs Annalen der Chemie, 1986, # 5, p. 839 - 858
作者:Laatsch, Hartmut
DOI:——
日期:——
Total synthesis of dl-3-oxodiplophyllin and dl-yomogin
作者:Drury Caine、Gerard Hasenhuettl
DOI:10.1021/jo01304a027
日期:1980.8
MARCO, J. ALBERTO;CARDA, MIGUEL, TETRAHEDRON, 43,(1987) N 11, 2523-2532
作者:MARCO, J. ALBERTO、CARDA, MIGUEL
DOI:——
日期:——
Synthesis of umbellifolide and three natural eudesman-12,8-olides from (-)-artemisin