Synthesis of α-Alkynyl-β,β,β-trifluoroalanine Derivatives by Sonogashira Cross-Coupling Reaction
作者:Grigorii T. Shchetnikov、Maria A. Zotova、Christian Bruneau、Pierre H. Dixneuf、Sergey N. Osipov
DOI:10.1002/ejoc.200901354
日期:2010.3
An efficient route to new α-CF 3 -α-amino acid derivatives bearing an arylalkynyl moiety at the α-carbon atom has been developed. The method is based on palladium-catalyzed cross-coupling of the corresponding α-propargyl (ethynyl) α-amino esters with aryl halides to afford the amino acid derivatives with an internal triple bond that is suitable for further modifications.
Lossen rearrangement by Rh(<scp>iii</scp>)-catalyzed C–H activation/annulation of aryl hydroxamates with alkynes: access to quinolone-containing amino acid derivatives
作者:Dmitry A. Petropavlovskikh、Daria V. Vorobyeva、Ivan A. Godovikov、Sergey E. Nefedov、Oleg A. Filippov、Sergey N. Osipov
DOI:10.1039/d1ob01711j
日期:——
convenient and robust method for the preparation of new CF3-containing 2-quinolones has been developed via a Rh(III)-catalyzed C–H activation/Lossenrearrangement/annulation cascade of N-pivaloyloxy-arylamides with internal alkynes bearing an α-CF3-α-amino acid moiety on the triple bond. This work expands the scope of valuable products that are available through C–H activation/annulation reactions of
通过Rh( III )催化的C-H活化/ Lossen重排/环化级联N-新戊酰氧基-芳基酰胺与内部带有α三键上的-CF 3 -α-氨基酸部分。这项工作扩大了通过芳基酰胺在有机合成中的 C-H 活化/环化反应可获得的有价值产品的范围。