Total synthesis of the antiinflammatory and proresolving protectin D1
作者:Narihito Ogawa、Yuichi Kobayashi
DOI:10.1016/j.tetlet.2011.03.152
日期:2011.6
construction of the Z,E,E-triene structure by using the Suzuki coupling between the vinyl borane (C13–C22) and the vinyl iodide (C1–C12). The Z-enyne, the acetylene precursor of the vinyl borane was synthesized from optically active γ-TMS allylic alcohol in a straightforward way. On the other hand, the vinyl iodide was prepared by usingWittigreaction between the C8–C12 aldehyde possessing the requisite
The C16–C22 fragment with the acetylene terminus was constructed through the asymmetric dihydroxylation of the corresponding olefin, while the 15-iodo-olefin corresponding to the C11–C15 part was prepared via the asymmetric transfer hydrogenation of the corresponding acetylene ketone followed by hydrozirconation/iodination. Both pieces were joined by a Sonogashira coupling, and the product was further