Air-Tolerant Direct Thiol Esterification with Carboxylic Acids Using Hydrosilane via Simple Inorganic Base Catalysis
作者:Maojie Xuan、Chunlei Lu、Meina Liu、Bo-Lin Lin
DOI:10.1021/acs.joc.9b00500
日期:2019.6.21
thioesterification of carboxylicacids with thiolsusing nontoxic activation agents is highly desirable. Herein, an efficient and practical protocol using safe and inexpensive industrial waste polymethylhydrosiloxane as the activation agent and K3PO4 with 18-crown-6 as a catalyst is described. Various functional groups on carboxylicacid and thiol substituents can be tolerated by the present system to afford thioesters
非常需要使用无毒的活化剂将羧酸与硫醇直接硫酯化。在此,描述了一种有效且实用的方案,该方案使用安全且廉价的工业废聚甲基氢硅氧烷作为活化剂,并以18-crown-6作为催化剂的K 3 PO 4。本系统可以耐受羧酸和硫醇取代基上的各种官能团,从而以19-100%的收率提供硫酯。
Harnessing the catalytic behaviour of 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP): An expeditious synthesis of thioesters
作者:Pallavi Singh、Rama Krishna Peddinti
DOI:10.1016/j.tetlet.2017.04.004
日期:2017.5
promoting the thiocarbonylation of acyl halides and thiols is disclosed. HFIP was recovered with ease and reused for further reactions without any loss of reactivity. Both aryl and alkylthiols bearing electron-donating and electron-withdrawing groups as well as aryl- and alkyl acyl halides worked well in this reaction. Inexpensive precursors, short reaction time, obviating workup, high atom economy, and
A base-initiated thioesterification of amides with various thiols is reported. This reaction can take place efficiently under metal-free and air-atmospheric conditions, and provides a facile and practically useful approach to the synthesis of valuable acyl thioesters.
Methanesulfonic anhydride-promoted sustainable synthesis of thioesters from feedstock acids and thiols
作者:Pallavi Singh、Rama Krishna Peddinti
DOI:10.1007/s12039-020-01871-5
日期:2021.3
Abstract An unprecedented metal-, halogen- and solvent-free, MSAA-promoted S-carbonylation of thiols with feedstock acids has been developed. This new transformation provides an efficient and atom-economic strategy for the synthesis of thioesters in a single operation from readily available and inexpensive starting materials. The reaction avoids the use of expensive and hazardous coupling reagents
Oxalic Acid Monothioester for Palladium-Catalyzed Decarboxylative Thiocarbonylation and Hydrothiocarbonylation
作者:Bin Zhao、Yao Fu、Rui Shang
DOI:10.1021/acs.orglett.9b03701
日期:2019.12.6
hydrothiocarbonylation of unsaturated carbon–carbon bonds at room temperature with high chemo- and regioselectivity. The reaction is applicable to the synthesis of cysteine-derived thioesters, thus allowing chemical modification of cysteine-containing peptides. Decarboxylation of OAM proceeds through oxidative addition of Pd(0) to the acyl–S bond, which accounts for the very mild reaction conditions