Cross-coupling reactions with boronic acids in water catalysed by oxime-derived palladacycles
作者:Luis Botella、Carmen Nájera
DOI:10.1016/s0022-328x(02)01727-8
日期:2002.12
Palladacycles derived from phenone-oximes 1 are efficient precatalysts for the Suzuki–Miyaura coupling of arylboronic acids with aromatic and heteroaromatic bromides and chlorides under water reflux under aerobic conditions. Alternatively, the coupling can also be carried out at room temperature in methanol–water. Aryl bromides gave biaryls with TON up to 105 and TOF up to 7×104 h−1. Activated and
衍生自苯酮肟1的Palladacycles是有氧条件下在水回流下芳烃硼酸与芳族和杂芳族溴化物和氯化物的Suzuki-Miyaura偶联的有效预催化剂。或者,也可以在室温下在甲醇-水中进行偶联。芳基溴化物使联芳基的TON高达10 5,TOF高达7×10 4 h -1。活化和失活的芳基氯化物需要存在TBAB才能偶联,表现出稍低的效率(TON高达9000,TOF高达3850 h -1)。C(sp 2)C(sp 3)也可以通过三甲基环硼氧烷和丁基硼酸与芳族溴化物和氯化物在水回流下以及苄基和烯丙基氯化物或乙酸酯与芳基硼酸在丙酮-水中在室温下的交叉偶联反应形成。