N-Substituted Thiocarbamide

When ethanol acts as solvent, and NaOH and sulfur are used as contact agent, this overall reaction can be divided into the following steps  

It can be seen that side reaction occurs when CS2 and NaOH are surplus in solution. When sulfur acts as contact agent, the overall reaction takes place quickly. But sulfur can react with phenylisothiocyanate to form benzothiazole mercaptan  

Benzothiazole mercaptan can be removed in the refined process. Aiming at reducing the benzothiazole mercaptan, the sulfur dosage can be decreased. The burdening of synthesis reaction is as follows  

In addition, diphenyl thiourea can be produced via the reaction of aliphatic amine and 82- Firstly, alkyl dithiocarbamate is prepared by the following reaction  

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The alkyl derivatives of thiocarbamide can be divided into N-substituted thiocarbamide and S-substituted thiocarbamide. The expressions of N-substituted thiocarbamide and S-substituted thiocarbamide are given as follows ... 

The properties of N-substituted thiocarbamide and S-substituted thiocarbamide will be further expounded by the following sections. 

It was reported that some new N-substituted thiocarbamides are prepared from diamines and CS2. The synthesis reaction of new N-substituted thiocarbamides is given as follows ... 

These new N-substituted thiocarbamides such as N, N —ethylidenethiocar-bamide and N, N —propylidenethiocarbamide are characterized by low-toxicity, good solubility, and flotation performance. 

Fig. 1.2 Flotation results of Cu and Mo ores using these two N-substituted thiocarbamides, butyi...

A number of substituted derivatives of 305 (cis, n = 1, 2 trans, n = 2), 306 cis or trans), 307, and 308 diendo and diexo) (R = Me, Et, Ph, substituted aryl) were prepared from the corresponding amino acids with isothiocyanate and acidic ring closure of the resulting thiocarbamide... 

Complexes [NbCULJCl, where L = RNHCSNHpy, were obtained 150 their IR spectra indicate bidentate behavior of L via sulfur and the heterocyclic nitrogen they exhibit semiconductor properties. Similar behavior and properties were reported for the adducts formed with N, N -diaryl-substituted formamidino-AP -aryl-substituted carbamides and thiocarbamides. 

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