Organocatalytic Transformation of Aldehydes to Thioesters with Visible Light
作者:Yueteng Zhang、Peng Ji、Wenbo Hu、Yongyi Wei、He Huang、Wei Wang
DOI:10.1002/chem.201900932
日期:2019.6.21
A metal‐ and oxidant‐free catalytic method for accessing structurally diverse thioesters from readily accessible, widespread aldehydes, is described. A strategy of a simple organic 9,10‐phenanthrenequinone‐promoted hydrogen atom transfer (HAT) with visible light was successfully implemented to selectively generate acyl radicals without inducing crossover reactivity of thioester products. The preparative
efficiently using a rhodium catalyst. The broad functional-group tolerance and mild conditions of the method have allowed for the two-step decarboxylative borylation of a wide range of aromatic carboxylicacids, including commercially available drugs.
Nickel-catalyzed carbonylation of thioacetates with aryl iodides via CO insertion and C–S bond cleavage
作者:Wen-Peng Mai、Hong-Da Sui、Ming-Xiu Lv、Kui Lu
DOI:10.1177/17475198211028114
日期:2021.9
Aryl thioesters are synthesized via nickel-catalyzed carbonylation of thioacetates with aryliodides. Alkyl thioacetates undergo coupling with carbon monoxide and aryliodides to produce the desired aryl thioesters in moderate yields. This catalytic carbonylative coupling process provides a cost-effective and direct approach for the preparation of useful thioesters.
Synthesis of Thioesters by Simultaneous Activation of Carboxylic Acids and Alcohols Using PPh<sub>3</sub>/NBS with Benzyltriethylammonium Tetrathiomolybdate as the Sulfur Transfer Reagent
A new and simple route for the synthesis of thioesters starting from carboxylicacids and alcohols is reported by usingtetrathiomolybdate as the key sulfurtransferreagent. Triphenylphosphane and N-bromosuccinimide were used for the activation of the carboxylicacid and alcohol in the same pot followed by the transfer of sulfur from tetrathiomolybdate. Thioesters were obtained in good to moderate
Synthesis of diaryl ketones via a phosphine-free Fukuyama reaction
作者:Kamala Kunchithapatham、Chad C. Eichman、James P. Stambuli
DOI:10.1039/c1cc16114h
日期:——
The synthesis of unsymmetrical diarylketones via the Fukuyama coupling of thioesters and organozinc reagents is described. Typically, the synthesis of diarylketones using this methodology provides low yields. The simple complex, Pd(dba)(2), was found to convert a variety of aryl thioesters to diarylketones in good yields.