Stereoselective Synthesis of 1,3-Diaminotruxillic Acid Derivatives: An Advantageous Combination of CH-<i>ortho</i>
-Palladation and On-Flow [2+2]-Photocycloaddition in Microreactors
作者:Elena Serrano、Alberto Juan、Angel García-Montero、Tatiana Soler、Francisco Jiménez-Márquez、Carlos Cativiela、M. Victoria Gomez、Esteban P. Urriolabeitia
DOI:10.1002/chem.201503742
日期:2016.1.4
The stereoselective synthesis of ε‐isomers of dimethyl esters of 1,3‐diaminotruxillic acid in three steps is reported. The first step is the ortho‐palladation of (Z)‐2‐aryl‐4‐aryliden‐5(4H)‐oxazolones 1 to give dinuclear complexes 2 with bridging carboxylates. The reaction occurs through regioselective activation of the ortho‐CH bond of the 4‐arylidene ring in carboxylic acids. The second step is