In organic chemistry, thiocarbamates (thiourethanes) are a family of organosulfur compounds. As the prefix thio- suggests, they are sulfur analogues of carbamates. There are two isomeric forms of thiocarbamates: O-thiocarbamates, ROC(=S)NR2 ( esters), and S-thiocarbamates, RSC(=O)NR2 ( thioesters).
Thiocarbamates can be synthesised by the reaction of water or alcohols upon thiocyanates ( Riemschneider thiocarbamate synthesis): [1] [2]
Similar reactions are seen between alcohols and thiocarbamoyl chlorides such as dimethylthiocarbamoyl chloride; as well as between thiols and cyanates. [2] The herbicide Cycloate is produced in this way:
Other related thiocarbamate herbicides include vernolate (C3H7)2NCOSC3H7 and triallate ((i−C3H7)2NCOSCH2CCl=CCl2. [3]
Salts of thiocarbamate arise by the reaction of amines with carbonyl sulfide:
In the Newman-Kwart rearrangement O-thiocarbamates can isomerise to S-thiocarbamates. [4] This reaction, which generally requires high temperatures, is an important method for the synthesis of thiophenols.
Goitrin is a cyclic thiocarbamate found in some vegetables. [5]
In organic chemistry, thiocarbamates (thiourethanes) are a family of organosulfur compounds. As the prefix thio- suggests, they are sulfur analogues of carbamates. There are two isomeric forms of thiocarbamates: O-thiocarbamates, ROC(=S)NR2 ( esters), and S-thiocarbamates, RSC(=O)NR2 ( thioesters).
Thiocarbamates can be synthesised by the reaction of water or alcohols upon thiocyanates ( Riemschneider thiocarbamate synthesis): [1] [2]
Similar reactions are seen between alcohols and thiocarbamoyl chlorides such as dimethylthiocarbamoyl chloride; as well as between thiols and cyanates. [2] The herbicide Cycloate is produced in this way:
Other related thiocarbamate herbicides include vernolate (C3H7)2NCOSC3H7 and triallate ((i−C3H7)2NCOSCH2CCl=CCl2. [3]
Salts of thiocarbamate arise by the reaction of amines with carbonyl sulfide:
In the Newman-Kwart rearrangement O-thiocarbamates can isomerise to S-thiocarbamates. [4] This reaction, which generally requires high temperatures, is an important method for the synthesis of thiophenols.
Goitrin is a cyclic thiocarbamate found in some vegetables. [5]