Pivotal Neighboring-Group Participation in Substitution versus Elimination Reactions – Computational Evidence for Ion Pairs in the Thionation of Alcohols with Lawesson's Reagent
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201700127
Abstract: The mechanism of the thionation of alcohols with Lawesson's reagent was explored through quantum chemical DFT methods. Evidence that carbocations are involved was found. The mechanism is completely different to that established recently for the… read more here.
Keywords: thionation; alcohols lawesson; lawesson reagent; thionation alcohols ... See more keywords
Oxidation of thiazolo[3,2-a]pyrimidin-3(2H)-ones with DMSO and Lawesson’s reagent
Sign Up to like & getrecommendations! Published in 2018 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2018.02.014
Abstract: Abstract 2,2′-Dimers with a central double bond were prepared by the oxidation of 5,6-disubstituted 7-methyl-5 H -[1,3]thiazolo[3,2- a ]pyrimidin-3(2 H )-ones with DMSO and Lawesson’s reagent at room temperature. The role of DMSO as an… read more here.
Keywords: ones dmso; thiazolo pyrimidin; lawesson reagent; pyrimidin ones ... See more keywords
Homolytic cleavage of Lawesson's reagent: N-heterocyclic carbene complexes of ArPS2 (Ar = 4-CH3O-C6H4).
Sign Up to like & getrecommendations! Published in 2018 at "Dalton transactions"
DOI: 10.1039/c8dt00457a
Abstract: Lawesson's reagent (LR) has been shown to react with the N-heterocyclic carbenes [1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes) and 1,3-bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene (SIPr)] to give adducts of the general form NHC·P(S)2-C6H4OCH3. Full characterizations, including X-ray crystal structures, are provided. The reaction… read more here.
Keywords: lawesson; lawesson reagent; reagent heterocyclic; cleavage lawesson ... See more keywords
The unusual influence of hetaryl groups on the direct conversion of some secondary alcohols into thiols with Lawesson’s reagent: elucidation of the reaction mechanism
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Sulfur Chemistry"
DOI: 10.1080/17415993.2017.1313257
Abstract: ABSTRACT A series of hetaryl-substituted methanols were used for direct conversion into the corresponding thiols by treatment with Lawesson’s reagent in boiling toluene. Unexpectedly, the respective sulfides were formed exclusively. In the case of chiral… read more here.
Keywords: lawesson reagent; direct conversion; influence hetaryl; unusual influence ... See more keywords