中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-methylpropyl (2S,4R)-4-benzyl-4-methyl-5-oxo-2-(4-phenylphenyl)-1,3-oxazolidine-3-carboxylate | 346578-00-5 | C28H29NO4 | 443.543 |
—— | 2-methylpropyl (2S,4R)-4-[(4-bromophenyl)methyl]-4-methyl-5-oxo-2-(4-phenylphenyl)-1,3-oxazolidine-3-carboxylate | 346578-01-6 | C28H28BrNO4 | 522.439 |
Three different protocols to synthesize oxazolidin-5-ones have been studied with the goal to develop a method to synthesize a diastereomerically pure oxazolidin-5-one. A novel method is reported that uses a dynamic crystallization-induced asymmetric transformation to isolate a single diastereomer of an oxazolidin-5-one in 92% yield on kilogram scale. Alkylation of the oxazolidin-5-one template leads to good-to-excellent yields of N-protected α-substituted alanine esters in >98–99% ee.