Ugi Reactions with Ammonia Offer Rapid Access to a Wide Range of 5-Aminothiazole and Oxazole Derivatives
摘要:
A series of Ugi reactions has been successfully performed using ammonia as the amine component, employing 2,2,2-trifluoroethanol its a non-nucleophilic solvent in order to suppress known side reactions. Utilizing concentrated aqueous ammonia its it convenient Source, this approach offered a simple, one-step assembly of Ugi adducts suitable for elaboration into it variety of 5-aminoazole compounds through postcondensation modifications. Free or N-substituted 5-aminothiazoles and 5-(trifluoroacetamido)oxazoles were all prepared by this improved methodology. The scope of the synthetic route developed and application of the different products are discussed.
Ugi Reactions with Ammonia Offer Rapid Access to a Wide Range of 5-Aminothiazole and Oxazole Derivatives
摘要:
A series of Ugi reactions has been successfully performed using ammonia as the amine component, employing 2,2,2-trifluoroethanol its a non-nucleophilic solvent in order to suppress known side reactions. Utilizing concentrated aqueous ammonia its it convenient Source, this approach offered a simple, one-step assembly of Ugi adducts suitable for elaboration into it variety of 5-aminoazole compounds through postcondensation modifications. Free or N-substituted 5-aminothiazoles and 5-(trifluoroacetamido)oxazoles were all prepared by this improved methodology. The scope of the synthetic route developed and application of the different products are discussed.
[EN] THIAZOLE AND OXAZOLE DERIVATIVES FOR USE IN THE TREATMENT OF PRION DISEASES, CANCER AND CONDITIONS OF THE CENTRAL NERVOUS SYSTEM AS WELL AS IN THE REGULATION OF STEM CELLS<br/>[FR] DÉRIVÉS DE THIAZOLE ET D'OXAZOLE S'UTILISANT DANS LE TRAITEMENT DE MALADIES À PRIONS, DU CANCER ET DE TROUBLES DU SYSTÈME NERVEUX CENTRAL, ET DANS LA RÉGULATION DE CELLULES SOUCHES
申请人:UNIV SHEFFIELD
公开号:WO2008090382A1
公开(公告)日:2008-07-31
[EN] Compounds of the formula (I) are provided: Fomula (I) wherein X, Y, R1, R2 and R3 are as defined in the specification. The compounds may be useful in the treatment of various diseases and conditions, in particular prion diseases. [FR] L'invention concerne des composés représentés par la formule (I), dans laquelle X, Y, R1, R2 et R3 sont tels que définis dans la description. Ces composés peuvent être utiles dans le traitement de diverses maladies et affections, en particulier les maladies à prions.
Ugi Reactions with Ammonia Offer Rapid Access to a Wide Range of 5-Aminothiazole and Oxazole Derivatives
作者:Mark J. Thompson、Beining Chen
DOI:10.1021/jo9014529
日期:2009.9.18
A series of Ugi reactions has been successfully performed using ammonia as the amine component, employing 2,2,2-trifluoroethanol its a non-nucleophilic solvent in order to suppress known side reactions. Utilizing concentrated aqueous ammonia its it convenient Source, this approach offered a simple, one-step assembly of Ugi adducts suitable for elaboration into it variety of 5-aminoazole compounds through postcondensation modifications. Free or N-substituted 5-aminothiazoles and 5-(trifluoroacetamido)oxazoles were all prepared by this improved methodology. The scope of the synthetic route developed and application of the different products are discussed.