Patent ID: 11970441
Assignee: CENTRAL SOUTH UNIVERSITY
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method for preparing a thionocarbamate, comprising the following steps:
step 1): esterification reaction of a xanthate having a structure shown in formula I with 2-haloethanol to obtain an O-alkyl/alkylthioethyl-S-hydroxyethyl xanthate having a structure shown in formula II;
step 2): aminolysis reaction of the O-alkyl/alkylthioethyl-S-hydroxyethyl xanthate with a fatty amine shown in formula III to obtain a reaction mixture of a thionocarbamate shown in formula IV and 2-mercaptoethanol;
step 3): washing the reaction mixture obtained in step 2 with an alkali to convert the 2-mercaptoethanol in the reaction mixture to 2-hydroxyethyl thiolate, and separating the thionocarbamate as an oil phase from the 2-hydroxyethyl thiolate as an aqueous phase;, wherein, in formula I, M is Na+, K+ or NH4+; in formula I, formula II and formula IV, R1 is C1 to C16 alkyl, C1 to C16 aryl, or alkylthioethyl shown in formula V; in formula III and formula IV, R2 is C1 to C8 alkyl; and, wherein, in formula V, R3 is C1 to C16 alkyl or aryl.