[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
Organocatalytic Synthesis of N-Phenylisoxazolidin-5-ones and a One-Pot Synthesis of β-Amino Acid Esters
摘要:
A novel N-heterocyclic carbene (NHC)-catalyzed C-N bond formation by the reaction of alpha,beta-unsaturated aldehydes and nitrosobenzene to N-phenylisoxazolidin-5-ones, followed by an acid-catalyzed esterification and Bamberger-like rearrangement in a mild one-pot protocol leads to N-p-methoxyphenyl (N-PMP) protected beta-amino acid esters.
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.
[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
申请人:AGENCY SCIENCE TECH & RES
公开号:WO2008115149A9
公开(公告)日:2009-10-15
Organocatalytic Synthesis of <i>N</i>-Phenylisoxazolidin-5-ones and a One-Pot Synthesis of β-Amino Acid Esters
作者:Jayasree Seayad、Pranab Kumar Patra、Yugen Zhang、Jackie Y. Ying
DOI:10.1021/ol800003n
日期:2008.3.1
A novel N-heterocyclic carbene (NHC)-catalyzed C-N bond formation by the reaction of alpha,beta-unsaturated aldehydes and nitrosobenzene to N-phenylisoxazolidin-5-ones, followed by an acid-catalyzed esterification and Bamberger-like rearrangement in a mild one-pot protocol leads to N-p-methoxyphenyl (N-PMP) protected beta-amino acid esters.