Synthesis of functionalized carbo- and heterocycles via gold-catalyzed cycloisomerization reactions of enynes
作者:Lucie Leseurre、Chung-Meng Chao、Tomohiro Seki、Emilie Genin、Patrick Y. Toullec、Jean-Pierre Genêt、Véronique Michelet
DOI:10.1016/j.tet.2008.11.105
日期:2009.2
conditions were compatible with various functional groups on the nucleophiles. Severe limitations were observed when the allylic position of the enyne is substituted by electron-withdrawing groups. The mechanism of the reaction was investigated via the synthesis of a deuterated aromatic ring: we showed that the source of proton involved in the protodemetallation step originates from the acidic activated
PPh 3 AuCl / AgSbF 6催化体系促进了Friedel-Crafts串联式将富电子的芳族和杂芳族衍生物加到未活化的烯烃中,然后进行C-C键环化反应。该系统的效率允许在很短的时间内进行室温反应。研究了该反应的范围和局限性。反应条件与亲核试剂上的各种官能团相容。当烯炔的烯丙基位置被吸电子基团取代时,观察到严重的局限性。通过氘代芳环的合成研究了反应机理:我们表明,参与原金属脱金属步骤的质子源于亲核试剂的酸性活化C-H键。