Described herein are compounds of formula (I), related compositions, and their use, for example in the formation of α-amino acids or a precursor thereof such as an α-aminonitrile.
evaluated as ligands for catalytic asymmetric Streckerreactions. N-Benzhydrylaldimines derived from aromatic and aliphatic aldehydes reacted with TMSCN in the presence of 10 mol% of Ti-1 complex to give the Strecker products in excellent yields and in up to >98% ee. The presence of a protic additive is essential to ensure good conversion and reaction rate. The reaction conditions are simple and the stereochemical
A mild and efficient aza-Diels–Alder reaction of N-benzhydryl imines with trans-1-methoxy-2-methyl-3-trimethylsiloxybuta-1,3-diene catalyzed by Yb(OTf)3
作者:Ke Cheng、Lili Lin、Shikui Chen、Xiaoming Feng
DOI:10.1016/j.tet.2005.07.082
日期:2005.10
The aza-Diels-Aider reaction of trans-1-methoxy-2-methyl-3-trimethylsiloxybuta-1,3-diene with N-benzhydryl imines in the presence of Yb(OTf)(3) in toluene at room temperature gave the corresponding 2,5-disubstituted 2,3-dihydro-4-pyridones in high yields. This reaction can also be carried out with diene, aldehydes, and amine in a three-component one-pot reaction manner in moderate to high yields under solvent-free conditions. The relationship between Lewis acids and activity, solvents and catalyst loading were studied. Some investigation towards the reaction mechanism was discussed. (c) 2005 Elsevier Ltd. All rights reserved.
US8859812B2
申请人:——
公开号:US8859812B2
公开(公告)日:2014-10-14
[EN] COMPOUNDS AND RELATED METHODS OF USE<br/>[FR] COMPOSÉS ET PROCÉDÉS D'UTILISATION S'Y RAPPORTANT
申请人:HARVARD COLLEGE
公开号:WO2011031764A2
公开(公告)日:2011-03-17
Described herein are compounds of formula (I), related compositions, and their use, for example in the formation of α-amino acids or a precursor thereof such as an α-aminonitrile.