A one-pot conversion of di-substituted thiourea to<i>O</i>-organyl arylthiocarbamate using FeCl<sub>3</sub>
作者:Santosh K. Sahoo、Supratim Chakraborty、Bhisma K. Patel
DOI:10.1080/17415993.2011.640328
日期:2012.4.1
Unsymmetrical thiourea, which on demand can generate isothiocyanate in the presence of FeCl3, can serve as a latent isothiocyanate functionality and circumvent the difficulties associated with the direct use of reactive isothiocyanate functionality. An unusual and unorthodox reactivity has been achieved during a one-pot reaction of an unsymmetrically di-substituted thiourea with an alcohol in the presence of FeCl3 leading to an expeditious synthesis of O-organyl arylthiocarbamates. In this reaction, a thiono-ester (C-O) bond is formed at the expense of a thioamidic (C-N) bond and works over a wide range of structurally diverse thioureas and alcohols without affecting the other functional groups.[GRAPHICS].