Treatment of an alkyne with iodine monochloride and sodium iodide at room temperature results in the formation of the thermodynamic (E)-diiodoalkene. The corresponding (Z)-diiodoalkene can also be produced, by treatment of the alkyne with iodine monochloride at −78 °C in the presence of tetraethylammonium iodide. Such 1,2-diiodoalkenes are useful for the synthesis of more functionalised alkenes by using either Stille or Suzuki cross-coupling protocols.
在室温下将炔与单
氯碘和
碘化钠反应,可以形成热力学稳定的(E)-二
碘烯。相应的(Z)-二
碘烯可以通过在−78°C下,用
四乙基铵碘化物处理炔与单
氯碘来生成。这类1,2-二
碘烯对于使用斯蒂尔(Stille)或铃木(Suzuki)交叉偶联方法合成更多功能化烯烃非常有用。