Model studies for the stereoselective construction of the BC-ring of armatol F based on Ireland-Claisen rearrangement and relay ring-closing olefin metathesis
作者:Kenshu Fujiwara、Keita Tanaka、Yasushi Katagiri、Hidetoshi Kawai、Takanori Suzuki
DOI:10.1016/j.tetlet.2010.06.103
日期:2010.8
triterpene, has a fused tricyclic ether moiety (BCD-ring) with an unusual cis ring junction at C18–C19 between the C- and D-rings. En route to the total synthesis of armatol F, the stereoselective construction of the C18 and C19 stereocenters by Ireland-Claisen rearrangement and the formation of the C-ring by relay ring-closing olefin metathesis were established through the synthesis of monocyclic (C-ring)
从红藻软骨藻中分离出来的Armatol F是聚醚三萜,具有稠合的三环醚部分(BCD环),在C环和D环之间的C18-C19处有不寻常的顺式环结。在全合成armatol F的过程中,通过单环(C-ring)的合成,建立了通过Ireland-Claisen重排的C18和C19立体中心的立体选择性结构,以及通过中继闭环烯烃复分解形成的C-ring。 )和双环(BC环)模型化合物。