作者:Antonella Di Nicola、Vincenzo Marsicano、Antonio Arcadi、Véronique Michelet
DOI:10.1016/j.tetlet.2020.151725
日期:2020.4
alkylynamides. The reaction conditions were optimized and the presence of a base was necessary for the efficient preparation of enamides at room temperature. Conversely, α,β-disubstituted or β,β’-disubstituted enamides were isolated as major single stereoisomers and at room temperature in water in the absence of any additive by using PCy3 or P(o-Tol)3, respectively. The best activity was observed for oxazolidin-2-one
与PCy 3或P(o- Tol)3的使用相比,在水溶性工业TPPTS配体存在的情况下,在纯水中研究了Pd催化的酰胺的加氢芳基化反应。Pd(OAc)2 / TPPTS(3,3',3″-膦三基三(苯磺酸)三钠盐)体系在存在带有给电子性的芳基硼酸的情况下,对各种芳基和烷基-酰胺的转化表现出高活性和吸电子基团。加氢芳基化反应允许形成(Z)-α,β-二取代的酰胺类化合物,对于芳基炔基酰胺是主要化合物,而对于烷基炔基酰胺则是独特的异构体。优化反应条件,并且在室温下有效制备烯酰胺必须有碱的存在。相反,分别通过使用PCy 3或P(o- Tol)3分离出α,β-二取代或β,β'-二取代的酰胺类化合物作为主要的单一立体异构体,并在室温下于无任何添加剂的水中分离。恶唑烷-2-酮的活性最佳,而其他甲苯磺酰胺则无反应。