A simple and straightforward synthesis of phenyl isothiocyanates, symmetrical and unsymmetrical thioureas under ball milling
作者:Ze Zhang、Hao-Hao Wu、Ya-Jun Tan
DOI:10.1039/c3ra43252a
日期:——
anilines were efficiently transformed into isothiocyanates (in presence of 5.0 equiv. CS2) or symmetricalthioureas (in presence of 1.0 equiv. CS2), without using any other harsh or toxic decomposition reagent. Some in situ generated isothiocyanates can directly “click” with other amines to afford unsymmetricalthioureas.
An efficient synthesis of 2-(N-aryl)aminobenzo[d]-1,3-thiazoles viaintramolecular C–S bondformation/C–H bondfunctionalization utilizing an unusual cocatalytic Au-NPs/KMnO4 system under an oxygen atmosphere at 80 °C is presented. Au-NPs can be easily prepared by using HAuCl4 with reductive potential of Kayea assamica (sia nahor) aqueous fruit extract. The catalyst can be easily separated and recycled