L-苯甘氨醇 、 丙酮酸乙酯 在
silica 、 petrol 、 乙醚 作用下,
以
2,2,2-三氟乙醇 为溶剂,
反应 24.0h,
以to furnish the title compound as a white solid (1.83 g, 44%)的产率得到(5S)-3-methyl-5-phenyl-5,6-dihydro-2H-1,4-oxazin-2-one
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
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。
Amino acid derivatives
申请人:Graham Rene Shelley
公开号:US20060247291A1
公开(公告)日:2006-11-02
The present invention relates to a method of treating pain using a compound of formula
wherein R
1
, R
2
, R
3
and R
4
are as defined herein. The invention also relates to certain novel derivatives of formula (I).
catalytic Ugi-type condensation of α-isocyanoacetamide and chiral cyclic imine is developed, where the combination of phenyl phosphilic acid and trifluoroethanol is exploited to promote the Ugi-type condensation with α-isocyanoacetamide for the first time. Under this new catalytic system, the reaction using the cyclic imines as relatively inertial substrates proceed well, and chiral 3-oxazolyl-mor
Several novel heterocycles have been constructed asymmetrically on the basis of a catalyticUgi-type condensation of α-isocyanoacetamide and chiral cyclic imine. The combination of phenylphosphilic acid and trifluoroethanol is exploited to promote an Ugi-typereaction with α-isocyanoacetamide for the first time. By means of this reaction, chiral 3-oxazolyl morpholin-2-one/piperazin-2-one derivatives