[EN] N-HETEROCYCLIC CARBENE CATALYZED SYNTHESIS OF N-PHENYLISOXAZOLIDIN-5-ONE DERIVATIVE AND SYNTHESIS OF ß -AMINO ACID ESTER DERIVATIVE [FR] SYNTHÈSE DE CARBÈNE N-HÉTÉROCYCLIQUE CATALYSÉ D'UN DÉRIVÉ DE N-PHÉNYLISOXAZOLIDINE-5-ONE ET SYNTHÈSE D'UN DÉRIVÉ D'ESTER DE ß-ACIDE AMINÉ
N-HETEROCYCLIC CARBENE CATALYZED SYNTHESIS OF N-PHENYLISOXAZOLIDIN-5-ONE DERIVATIVE AND SYNTHESIS OF β-AMINO ACID ESTER DERIVATIVE
申请人:Zhang Yugen
公开号:US20100099886A1
公开(公告)日:2010-04-22
A process for preparing a N-phenylisoxazolidin-5-one derivative is provided. The process for preparing the N-phenylisoxazolidin-5-one derivative comprises reacting an α,β-unsaturated aldehyde with nitrosobenzene in the presence of a N-heterocyclic carbene (NHC) catalyst. A process for preparing an N-alkoxyphenyl protected β-amino acid ester derivative is further provided. The process for preparing the N-alkoxyphenyl protected β-amino acid ester derivative comprises reacting an α,β-unsaturated aldehyde with nitrosobenzene in the presence of a N-heterocyclic carbene (NHC) catalyst to form a N-phenylisoxazolidin-5-one derivative, and then treating the N-phenylisoxazolidin-5-one derivative with an alcohol in the presence of an acid catalyst. A process for preparing an N-alkoxyphenyl protected β-amino acid ester derivative, comprising treating a N-phenylisoxazolidin-5-one derivative with an alcohol in the presence of an acid catalyst, is also provided.
N-HETEROCYCLIC CARBENE CATALYZED SYNTHESIS OF N-PHENYLISOXAZOLIDIN-5-ONE DERIVATIVE AND SYNTHESIS OF ß-AMINO ACID ESTER DERIVATIVE
申请人:Agency for Science, Technology and Research
公开号:EP2139873A1
公开(公告)日:2010-01-06
[EN] N-HETEROCYCLIC CARBENE CATALYZED SYNTHESIS OF N-PHENYLISOXAZOLIDIN-5-ONE DERIVATIVE AND SYNTHESIS OF ß -AMINO ACID ESTER DERIVATIVE<br/>[FR] SYNTHÈSE DE CARBÈNE N-HÉTÉROCYCLIQUE CATALYSÉ D'UN DÉRIVÉ DE N-PHÉNYLISOXAZOLIDINE-5-ONE ET SYNTHÈSE D'UN DÉRIVÉ D'ESTER DE ß-ACIDE AMINÉ