An Efficient Procedure for the Synthesis of Morpholin-2-one-3-carboxamide Derivatives in Good Diastereoselectivity by the Ugi Reaction
作者:Xiaochuan Chen、Deguang Zhu、Ruijiao Chen、Haibo Liang、Sheng Li、Li Pan
DOI:10.1055/s-0029-1219533
日期:2010.4
series of 5-substituted morpholin-2-one-3-carbox-amide derivatives were efficiently synthesized by a Ugi three-component reaction involving chiral 5,6-dihydro[1,4]oxazin-2-one substrates, isocyanides and carboxylic acids. The newly formed chiral center in the product was obtained in good diastereoselectivity.
通过涉及手性 5,6-二氢[1,4]恶嗪-2-one 底物、异氰化物和羧酸的 Ugi 三组分反应有效合成了一系列 5-取代吗啉-2-one-3-羧酰胺衍生物酸。产物中新形成的手性中心以良好的非对映选择性获得。
An Asymmetric Ugi Three-Component Reaction Induced by Chiral Cyclic Imines: Synthesis of Morpholin– or Piperazine–Keto-carboxamide Derivatives
4-oxazin-2-one substrates, as preformed cyclic aldimines and ketoimines, were employed to develop a new asymmetric Ugi three-component reaction for the first time. The Ugi reaction of the imines, isocyanides, and carboxylic acids opens an efficientaccess to novel morpholin-2-one-3-carboxamide compounds. The chiral imines showed promising stereoinduction for the new chiral center of the Ugi products, and