Jiang Jian-Zhong, Cai Chun
School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing, 210094, China.
J Colloid Interface Sci. 2006 Jul 15;299(2):938-43. doi: 10.1016/j.jcis.2006.02.035. Epub 2006 May 2.
The ligand-free Heck reaction catalyzed by Pd(OAc)2 performed well in a TX10 oil-in-water microemulsion. TEM proved in situ formation distributed palladium nanoparticles in the microemulsion. The role of TX10 in the reaction system is the palladium nanoparticles reducing agent and stabilizer. The effect of reaction parameters on the Heck reaction conversion were discussed. The results indicated that the aqueous phase concentration, the base concentration, and the temperature played key roles in the conversion of the reaction. Iodobenzene was converted to the corresponding trans-stilbene quantitatively within 90-150 min. Therefore, the heptane/TX 10/butanol/water/propylene glycol microemulsion containing in situ formed palladium nanoparticles was a very efficient catalyst system for the ligand-free Heck reaction.
由醋酸钯催化的无配体Heck反应在TX10水包油微乳液中表现良好。透射电子显微镜（TEM）证明微乳液中原位形成了分布的钯纳米颗粒。TX10在反应体系中的作用是钯纳米颗粒的还原剂和稳定剂。讨论了反应参数对Heck反应转化率的影响。结果表明，水相浓度、碱浓度和温度对反应转化率起关键作用。碘苯在90 - 150分钟内定量转化为相应的反式芪。因此，含有原位形成钯纳米颗粒的庚烷/TX10/丁醇/水/丙二醇微乳液是无配体Heck反应非常有效的催化剂体系。
