Schaefer, Gabriel published the artcileFacile Synthesis of Sterically Hindered and Electron-Deficient Secondary Amides from Isocyanates, Quality Control of 56-05-3, the publication is Angewandte Chemie, International Edition (2012), 51(36), 9173-9175, S9173/1-S9173/52, database is CAplus and MEDLINE.
The authors report a convenient and rapid approach to the synthesis of hindered and electron-deficient amides by the direct coupling of isocyanates with Grignard reagents. The hindered isocyanates are readily prepared from either amines or carboxylic acids using well-established methods. The isocyanates are easily handled compounds that can be stored for months without any sign of decomposition, and many of them are com. available. The Grignard reagents used in this study are either com. obtained or are readily prepared from the corresponding organo halide and magnesium metal.
Angewandte Chemie, International Edition published new progress about 56-05-3. 56-05-3 belongs to pyrimidines, auxiliary class Pyrimidine,Chloride,Amine,API, name is 2-Amino-4,6-dichloropyrimidine, and the molecular formula is C4H3Cl2N3, Quality Control of 56-05-3.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia