In this protocol, the chemoselective defluoromethoxylation reactions of 2-trifluoromethyl-1,3-enynes were developed. The enynic and allenic orthoesters were selectively produced in good to excellent yields via multiple substitution processes under mild reaction conditions, respectively. The enynic orthoester products were proved capable of acting as efficient “platform molecules” to access various
designed and accomplished for the synthesis of α‐aminonitriles with alcohol as the alkylation reagent. The strategy is environmentallyfriendly, scalable, and compatible with a wide range of functional groups, encompassing aromatic primary amines, secondary amines, and even alkylamine. Utilizing the merits of electro‐organic synthesis, it can be readily magnified from milligram to gram scale by simply adjusting
The cyanation of acetals and orthoesters by using a stericallycongestedα-cyanoamine as a cyanatingreagent was investigated. The α-cyanoamine effectively facilitated cyanation in the presence of trichlorosilyl triflate to produce a variety of cyanated adducts in excellent yields. Analysis of the reaction mixture by 1H NMR spectroscopy revealed that trichlorosilyl triflate produced an oxocarbenium
研究了使用空间拥挤的 α-氰胺作为氰化试剂对缩醛和原酸酯进行氰化。α-氰基胺在三氟甲磺酸三氯甲硅烷酯存在下有效促进氰化,以优异的产率生产各种氰化加合物。通过 1 H NMR 光谱分析反应混合物表明,三氟甲磺酸三氯甲硅烷基酯产生作为中间体的氧代碳鎓阳离子物质。
Electrochemically enabled decyanative C(sp<sup>3</sup>)–H oxygenation of <i>N</i>-cyanomethylamines to formamides
Selective oxygenation of C(sp3)–Hbonds adjacent to nitrogen atoms is a highly attractive strategy for synthesizing various formamide derivatives while preserving the substrate skeletons. Herein, an environmentally benign electrochemically enabled decyanative C(sp3)–H oxygenation of N-cyanomethylamines using H2O as a carbonyl oxygen atom source is described, leading to the synthesis of a large class
与氮原子相邻的C(sp 3 )–H 键的选择性氧化是合成各种甲酰胺衍生物同时保留底物骨架的极具吸引力的策略。在此,描述了使用 H 2 O 作为羰基氧原子源对N-氰基甲胺进行环境友好的电化学脱氰 C(sp 3 )–H 氧化反应,从而以良好至优异的收率合成了一大类甲酰胺,具有在无金属和无氧化剂的条件下具有广泛的底物范围。这种电化学技术突出了将N-甲酰基轻松结合到一些重要的生物活性分子中。