Effect of successive increase in alcohol chains on reaction with isocyanates and isothiocyanates
作者:Shahnaz Perveen、Arfa Yasmin、Khalid Mohammed Khan
DOI:10.1080/14786410802270738
日期:2010.1.10
The reaction of isocyanates and isothiocyanates with long-chain alcohols, e.g. n-hexanol, n-heptanol and n-octanol, exclusively gave N-aryl-O-alkyl carbamates, while N-aryl-O-alkyl carbamates were formed along with symmetrical 1,3-disubstituted ureas and thioureas when the same reactions were carried out with small-chain alcohols at room temperature without using any solvent.
Synthesis of some thionocarbamates from O-isopropyl xanthate and amines using Pd/Ti-HMS-10 as catalyst in water
作者:Reza Ranjbar-Karimi、Masumeh Asadi、Alireza Talebizadeh、Samira Saeednia、Sayed Mohammad Sayedbagheri
DOI:10.1007/s13738-016-0903-1
日期:2016.10
used as the support for a palladium-containing (1 wt%) catalyst. The materials, analyzed by XRD and SEM techniques, were tested in the synthesis of some thionocarbamates from reaction of sodium O-isopropyl carbonodithioate with the corresponding amines. The best yield was obtained with 3 mmol% of the catalyst (Pd/Ti-HMS-10) in water as solvent after 10–15-h heating at 75 °C. The structures of the products