3,5,5-Trisubstituted Hydantoins from Activated (Benzyloxycarbonylamino)malonic Acids
作者:Michael Gütschow、Lukáš Hroch、Marie Hrušková、Janina Schmitz、Gregor Schnakenburg
DOI:10.1055/s-0031-1290974
日期:2012.6
2-alkyl-2-formamido-N 1,N 3-bis(aryl)malonamides were isolated. The formation of both types of products is expected to include a cyclization to 2-alkoxyoxazol-5(4H)-ones, acting as precursor for the hydantoins, or a further transformation to N-carboxy anhydrides, their chloride-promoted ring opening, and subsequent conversion to give the bis(aryl)malonamides. Diethyl 2-alkyl-2-(benzyloxycarbonylamino)malonates
摘要 将2-烷基-2-(苄氧基羰基氨基)丙二酸二乙酯皂化,用草酰氯活化,并用伯芳族胺处理。得到3,5-二取代的乙内酰脲-5-羧酰胺。作为第二产物,分离出2-烷基-2-甲酰胺基-N 1,N 3-双(芳基)丙二酰胺。预计这两种产品的形成都包括将其环化成2-烷氧基恶唑-5(4 H)-酮(用作乙内酰脲的前体),或进一步转化为N-羧酸酐,它们的氯化物促进开环,然后转化为双(芳基)丙二酰胺。 将2-烷基-2-(苄氧基羰基氨基)丙二酸二乙酯皂化,用草酰氯活化,并用伯芳族胺处理。得到3,5-二取代的乙内酰脲-5-羧酰胺。作为第二产物,分离出2-烷基-2-甲酰胺基-N 1,N 3-双(芳基)丙二酰胺。预计这两种产品的形成都包括将其环化成2-烷氧基恶唑-5(4 H)-酮(用作乙内酰脲的前体),或进一步转化为N-羧酸酐,它们的氯化物促进开环,然后转化为双(芳基)丙二酰胺。