Enhanced reactivity in the ammonolysis of phenyl thiolacetates in aqueous medium
作者:D. Rajarathnam、J. Babu、P. Ananthakrishna Nadar
DOI:10.1002/kin.10014
日期:2002.1
zwitterionic tetrahedraladditionintermediate (T±), whereby its formation is rate-determining (k1 step). Comparison of this reaction of thiolesters with a similar reaction of analogue oxyesters shows a mechanistic difference. Further, for thiolesters there is a rate enhancement with larger kN values. The change in mechanism and enhanced reactivity observed by substitution of the oxygen atom by sulphur
for generating thioesters from carboxylic acids and thioesters. This transformation features operational simplicity and high step-economy, wherein the −SR moiety of thioesters was smoothly transferred to carboxylic acid from thioacetates as the starting material. Various substrates with different levels of electronic nature were all applicable to this reaction, furnishing thioesters in moderate to
Thioesters as Bifunctional Reagents for 2‐Naphthylamine Sulfuracylation
作者:Fuhong Xiao、Shanshan Yuan、Dahan Wang、Saiwen Liu、Huawen Huang、Guo‐Jun Deng
DOI:10.1002/adsc.201900301
日期:2019.7.11
An efficient and convenient strategy for the preparation of diaryl sulfides via a Fe‐promoted direct sulfuracylation of 2‐naphthylamine using thioesters as bifunctional reagents is described. This synthetic strategy features high chemoselectivity, good substrate scope and functional group tolerance.