3898-08-6Relevant articles and documents
Green and efficient synthesis of thioureas, ureas, primary: O -thiocarbamates, and carbamates in deep eutectic solvent/catalyst systems using thiourea and urea
Bagherzadeh, Nastaran,Sardarian, Ali Reza,Inaloo, Iman Dindarloo
supporting information, p. 11852 - 11858 (2021/07/12)
An efficient and general catalysis process was developed for the direct preparation of various primary O-thiocarbamates/carbamates as well as monosubstituted thioureas/ureas by using thiourea/urea as biocompatible thiocarbonyl (carbonyl) sources. This procedure used choline chloride/tin(ii) chloride [ChCl][SnCl2]2 with a dual role as a green catalyst and reaction medium to afford the desired products in moderate to excellent yields. Moreover, the DES can be easily recovered and reused for seven cycles with no significant loss in its activity. Besides, the method shows very good performance for synthesizing the desired products on a large scale.
Synthesis and characterization of some heterocyclic analogues of N,N′-perarylated phenylene-1,4-diamines and benzidines as a new class of hole transport materials
Schumann, Joerg,Kanitz, Andreas,Hartmann, Horst
, p. 1268 - 1276 (2007/10/03)
Starting from N,N-diarylsubstituted thioureas 20 and thioacetamides 21 a series of heterocyclic analogous of N,N′-perarylated phenylene-1,4-diamines and benzidines was obtained. These compounds represent, as studied by DSC measurements, a new class of hole transporting materials with high thermal stability and high tendency to form stable amorphous states. Moreover, some of the new compounds are, as measured by cyclic voltammetry, easily reversibly oxidized indicating the formation of persistent radical ions. Such compounds, which are, in general, completely substituted by aryl groups at their heterocyclic moieties, have been successfully used as hole-transport materials in OLEDs.
