Copper-Catalyzed Dehydrogenative Cross-Coupling Reaction between Allylic CH Bonds and α-CH Bonds of Ketones or Aldehydes
作者:Xing-Fen Huang、Muhammad Salman、Zhi-Zhen Huang
DOI:10.1002/chem.201402114
日期:2014.5.26
A dehydrogenative cross‐coupling reaction between allylic CH bonds and the α‐CH bond of ketones or aldehydes was developed using Cu(OTf)2 as a catalyst and DDQ as an oxidant. This synthetic approach to γ,δ‐unsaturated ketones and aldehydes has the advantages of broad scope for both ketones and aldehydes as reactants, mild reaction conditions, good yields and atom economy. A plausible mechanism using
以Cu(OTf)2为催化剂,DDQ为氧化剂,开发了烯丙基CH键与酮或醛的α- CH键之间的脱氢交叉偶联反应。这种合成γ,δ-不饱和酮和醛的方法具有以下优点:酮和醛均作为反应物,反应条件温和,收率高,原子经济。还提出了使用Cu(OTf)2作为路易斯酸催化剂的合理机理(DDQ = 2,3-二氯-5,6-二氰基-1,4-苯醌; Tf =三氟甲磺酸盐)。