Enones from Acid Fluorides and Vinyl Triflates by Reductive Nickel Catalysis
作者:Feng-Feng Pan、Peng Guo、Chun-Ling Li、Peifeng Su、Xing-Zhong Shu
DOI:10.1021/acs.orglett.9b01164
日期:2019.5.17
A nickel-catalyzed reductive coupling between acid fluorides and vinyl triflates has been described. This method provides an efficient access to various enones and avoids the requirement for acyl or vinyl metallic reagents in the conventional approaches. The reaction proceeds with a broad range of acid fluorides and cyclic vinyl triflates, tolerating several functional groups. The utility of this synthetic
We describe here a Ni-catalysed deamidative fluorination of diverse amides with electrophilic fluorinating reagents. Different types of amides including aromatic amides and olefinic amides were well compatible, affording the corresponding acyl fluorides in good to excellent yields.
A convenient method for deoxyfluorination of aromatic and aliphatic carboxylicacids with CF3SO2OCF3 in the presence of a suitable base at room temperature has been developed. The reaction allows a straightforward access to a variety of acyl fluorides and proves that CF3SO2OCF3 is an effective deoxyfluorination reagent for carboxylicacids. The method features simplicity, expeditiousness, high efficiency
已经开发了在室温下在合适的碱存在下用CF 3 SO 2 OCF 3将芳族和脂族羧酸脱氧氟化的简便方法。该反应可直接获得各种酰基氟,并证明CF 3 SO 2 OCF 3是一种有效的羧酸脱氧氟化剂。该方法的特点是简单,快速,高效,易于处理,对官能团的耐受性强,底物范围广,产品收率高,许多胺引发剂的相容性,使用环境友好的试剂以及轻松去除副产物。该反应代表了三氟甲基三氟甲磺酸盐首次用作氟化试剂。
reductive elimination of the C–X bond. These reactions enable the synthesis of aryliodides, bromides, and chlorides using alkali metal halides. Regarding the reaction mechanism, the Xantphos ligand emerges as a crucial factor in promoting reductive elimination, leading to the formation of a stablePd(0) intermediate and an oxidative adduct trans-(Xantphos)Pd(ArCO)X. Two proposed mechanisms involve Xantphos-promoted