realized. Remarkably, by using a different copper precursor, the aldehydes obtained can be further hydrogenated to give the corresponding alcohols under the same conditions, formally named as hydroxymethylation of alkenes. Under pressure of syngas, various aldehydes and alcohols can be produced from alkenes with copper as the only catalyst, in excellent regioselectivity. Additionally, an all-carbon quaternary
Copper-catalyzed borofunctionalization of styrenes with B<sub>2</sub>pin<sub>2</sub> and CO
作者:Yang Yuan、Fu-Peng Wu、Xiao-Feng Wu
DOI:10.1039/d1sc04774d
日期:——
chemical molecules fromsimple and readily available feedstocks is a long-standing challenge to chemists. Here, we describe a copper-catalyzed borofunctionalization of styrenes with B2pin2 and carbon monoxide. A set of new sodium cyclic borates were obtained with NaOtBu as the base. These unique sodium cyclic borates can be easily converted into a variety of multifunctional β-boryl vinyl esters, boryl carbonates
从简单易得的原料构建结构复杂的高价值化学分子是化学家面临的长期挑战。在这里,我们描述了铜催化的苯乙烯与 B 2 pin 2和一氧化碳的硼官能化。以NaO t Bu为碱制备了一组新的环状硼酸钠。这些独特的环状硼酸钠可以很容易地转化为各种多功能的 β-硼基乙烯基酯、硼基碳酸酯、β-硼基醛和硼基乙烯基醚。此外,该程序还具有良好的官能团耐受性,并利用 CO 作为 C1 源。
Electrochemical Oxidative Difunctionalization of Alkenes to Access α-Oxygenated Ketones
作者:Changhui Dai、Yijie Shen、Yifan Wei、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.1c01831
日期:2021.10.1
Dioxygenation of alkenes was developed by the combination of electrochemical synthesis and aerobic oxidation, leading to easy accessibility of α-oxygenated ketones in an eco-friendly fashion. Using air as the oxygen source and the absence of transition metals were the critical features of this protocol. A wide range of alkenes and N-hydroxyimides were found to be compatible and provided α-oxygenated
Secondary amides are omnipresent structural motifs in peptides, natural products, pharmaceuticals, and agrochemicals. The copper-catalyzed enantioselective hydroaminocarbonylation of alkenes described in this study provides a direct and practical approach for the construction of α-chiral secondary amides. An electrophilic amine transfer reagent possessing a 4-(dimethylamino)benzoate group was the key
Four‐Component Borocarbonylation of Vinylarenes Enabled by Cooperative Cu/Pd Catalysis: Access to β‐Boryl Ketones and β‐Boryl Vinyl Esters
作者:Yang Yuan、Fu‐Peng Wu、Jian‐Xing Xu、Xiao‐Feng Wu
DOI:10.1002/anie.202006427
日期:2020.9.21
general four‐component synthetic procedure for the preparation of β‐boryl ketones and β‐boryl vinyl esters. Joint catalyzed by palladium and copper catalysts, borocarbonylative reaction between vinylarenes, aryl halides/triflates, B2Pin2, and carbon monoxide proceed successfully. A variety of synthetically useful β‐boryl ketones were synthesized in good to high yields by using aryl iodides as the substrates