A study was made of the isomerization reaction of a great variety of trimethyl alpha-keto trithioorthocarboxylates to alpha,alpha-bis(methylthio) thiolcarboxylates, intermediates of high synthetic value for the synthesis of alpha-arylpropionic acids. The reaction was carried out In methylene chloride in the presence of catalytic amounts of trityl perchlorate or methanesulfonic acid and was complete in 2 h at rt. In most of the investigated cases the result was positive, the yields usually being greater than 90%. Also the reaction mechanism was subjected to an experimental study.
Froeling,A.; Arens,J.F., Recueil des Travaux Chimiques des Pays-Bas, 1962, vol. 81, p. 1009 - 1023
作者:Froeling,A.、Arens,J.F.
DOI:——
日期:——
Chemistry of trialkylthiomethyl ions. II. A convenient synthesis of tetrathioorthocarbonate esters