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1,3-Dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone is a versatile solvent used in the N-alkylation of chiral and O-alkylation of aldoses. It is involved in the preparation of poly(aryl ethers). It is a cyclic urea and used as a polar aprotic organic solvent. Further, it reacts with trifluoro-methanesulfonic acid anhydride to prepare 2,2'-oxy-bis(1,3-dimethyl-tetrahydropyrimidinium) bis(trifluoromethanesulfonate).
Dipolar aprotic solvent recommended as a replacement for the carcinogenic hexamethylphosphoric triamide (HMPA) in many reactions: Helv. Chim. Acta, 65, 385 (1982). DMPU is non-mutagenic: Chimia, 39, 148 (1985). It is more useful than the lower homologue 1,3-Dimethyl-2-imidazolidinone, A16001 (mp 8oC) for low-temperature reactions. Can be used as a general replacement for HMPA in organolithium reactions: J. Am. Chem. Soc., 107, 719 (1985).
Has been found to be comparable to HMPA in promoting reductive coupling reactions with SmI2: J. Am. Chem. Soc., 110, 5064 (1988); J. Chem. Soc., Chem. Commun., 1775 (1992), and also in other reductions with the same reagent: J. Org. Chem., 58, 5008 (1993).
Nahra, F.; Brill, M.; Gómez-Herrera, A.; Cazin, C. S. J.; Nolan, S. P. Transition metal bifluorides. Coord. Chem. Rev. 2016, 307, 65-80.
Eagan, J. M.; Hori, M.; Wu, J.; Kanyiva, K. S.; Snyder, S. A. Synthesis and Applications of Hajos-Parrish Ketone Isomers. Angew. Chem. Int. Ed. 2015, 54 (27), 7842-7846.
Hazard Statements: H302-H318-H361
Harmful if swallowed. Causes serious eye damage. Suspected of damaging fertility or the unborn child.
Precautionary Statements: P201-P280-P305+P351+P338-P310a-P405-P501a
Obtain special instructions before use. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.