The author of 《A Convenient Synthetic Route of Diethyl (4-Oxo-chromeno[2,3-d]pyrimidin-2(5)-yl)phosphonates》 were Ali, Tarik E.; Assiri, Mohammed A.; Hassanin, Noha M.; Yahia, I. S.; Hussien, Mai S. A.. And the article was published in Journal of Heterocyclic Chemistry in 2019. Quality Control of N,N-Dimethylformamide Dimethyl Acetal The author mentioned the following in the article:
Novel di-Et (4-oxo-3,4-dihydro-2H-chromeno[2,3-d]pyrimidin-2-yl)phosphonate as two enantiomers and di-Et (4-oxo-1,5-dihydro-4H-chromeno[2,3-d]pyrimidin-5-yl) phosphonate were obtained in easy procedure via reaction of 2-imino-2H-chromene-3-carboxamide, DMF dimethyl-acetal, and di-Et phosphite in a simple one pot. Possible reaction mechanisms are proposed. The structures of the obtained products were confirmed by elemental analyses and spectral tools. The experimental process involved the reaction of N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Quality Control of N,N-Dimethylformamide Dimethyl Acetal)
N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Quality Control of N,N-Dimethylformamide Dimethyl Acetal
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem