Thiazoles and benzothiazoles undergo regioselective C2–H chalcogenation via the sequence of thiazole C2-functionalization with phosphines to produce phosphonium salts which in turn react with S- and Se-centered nucleophiles to give products of C2–H chalcogenation and allow for recovery of the starting phosphine. The atom economical sequence proceeds under mild conditions and features broad scope for
finds limited applications in fine chemical synthesis, resulting in molecules of modest complexity. Ethylene difunctionalization allows for the synthesis of much more complex chemicals, but it is rare and almost always relies on transition-metal catalysis. Herein, we report an unprecedented metal-free radical difunctionalization of ethylene through a functional group migration strategy. The use of sulfone-based
Metal-free radical-mediated alkylfunctionalization of ethylene and low-boiling-point alkenes
作者:Xu Zhang、Xinxin Wu、Yasu Chen、Chen Zhu
DOI:10.1039/d3gc01040f
日期:——
chemical materials in the petrochemical industry. Conversion of these inexpensive materials to value-added fine chemicals is of utmost importance. Herein, we report an efficient approach for radical alkylfunctionalization of gaseous ethylene and other light alkenes by remote functional groupmigration. Various alkyls including deuterated alkyl groups are readily incorporated into alkenes along with
Divergent Functionalization of Styrenes via Radical/Polar Crossover with CO
<sub>2</sub>
and Sodium Sulfinates
作者:Kimberly Benedetti Vega、José Antonio Campos Delgado、Lucas V. B. L. Pugnal、Burkhard König、José Tiago Menezes Correia、Márcio Weber Paixão
DOI:10.1002/chem.202203625
日期:——
tunable multicomponent reaction which involves CO2, sodium sulfinates and styrenes to access both β-sulfonylateds carboxylic acids through radical–polar crossover process and to α-substituted acrylates through sequential sulfonyl radical addition/coupling/elimination process. This setup exhibits excellent tolerance to different functional groups and its application towards biologically relevant molecules
不那么激进:自由基化学与极性化学的结合用于开发可调谐的多组分反应,该反应涉及 CO 2、亚磺酸钠和苯乙烯,通过自由基-极性交叉过程获得 β-磺酰化羧酸,并通过 α-取代丙烯酸酯连续的磺酰基加成/偶联/消除过程。该设置对不同的官能团表现出极好的耐受性,其在生物学相关分子和产品多样化方面的应用有助于该方法的综合效用。