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
Nucleophilic Substitution Reactions of Thiophenyl 4-Nitrobenzoates with Pyridines in Acetonitrile
作者:Han Joong Koh、Kwang Lae Han、Ikchoon Lee
DOI:10.1021/jo990115p
日期:1999.6.1
The kinetics of reactions between Z-thiophenyl 4-nitrobenzoates and X-pyridines in acetonitrile at 55.0 degrees C are investigated. The Brönstedplots obtained for the pyridinolysis of thiophenyl benzoates are curved, with the center of curvature at pK(a) approximately 4.2 (pK(a)(0)). The Brönstedplots for these nucleophilicreactions show a change in slope from a large (beta(X) congruent with 0.64-0
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