7341-96-0, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 7341-96-0 as follows.
To a stirred solution of ethynylcarbamoyl (Method 74; 43g, 0. 62mol) in water (310ml) cooled in ice bath was added ammonium thiosulphate (92.35g, 0. 62mol) in one portion. The reaction was allowed to warm to room temperature over 5 hours. To the reaction mixture was added a solution of iodine (79.2g, 0. 31mol) in MeOH (11) rapidly over 10 minutes to yield a dark solution. Ammonium thiosuphate was added until a yellow solution was obtained. The solvent was evaporated to approximately 400ml and extracted ether (3 x 300ml). The ethereal solution was washed brine (100ml), passed through phase separation paper and evaporated in vacuo to yield the title compound as a pale orange solid (32.8g, 52%). Mpt: 70-71 C.
According to the analysis of related databases, Propiolamide, the application of this compound in the production field has become more and more popular.
Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2003/76436; (2003); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics