Stereoselective synthesis of CF3-substituted trans- and cis-enediynes via carbocupration or hydrostannation reactions of CF3-containing diyne
作者:Tsutomu Konno、Misato Kishi、Takashi Ishihara、Shigeyuki Yamada
DOI:10.1016/j.tet.2014.02.015
日期:2014.4
smoothly subjected to carbocupration reaction with various organocuprates, followed by treatment of the resultant carbocupration adducts with iodine, the corresponding vinyl iodides being formed in good yields in a cis-addition manner. Thus obtained iodide could be successfully converted into CF3-substituted trans-enediynes in high yields. Also, hydrostannation reaction of the diyne proceeded well in a
由(Z)-2,3,3,3-四氟-1-碘代丙-1-烯容易地分两步制备的含CF 3的二炔,与各种有机铜化合物进行碳cup合反应,然后对其进行处理与碘的碳cup合加合物,相应的乙烯基碘化物以顺式加成的方式高收率地形成。如此获得的碘可以高收率成功地转化为CF 3取代的反式二烯炔。此外,二炔的反应hydrostannation在进展顺利反-addition方式,得到高产率的相应的乙烯基锡烷。还发现乙烯基锡烷可有效转化为CF 3-高取代度的顺式-二烯二炔。