Photocatalytic decarboxylative alkenylation of α-amino and α-hydroxy acid-derived redox active esters by NaI/PPh<sub>3</sub> catalysis
作者:Ya-Ting Wang、Ming-Chen Fu、Bin Zhao、Rui Shang、Yao Fu
DOI:10.1039/c9cc09654j
日期:——
Herein, we report the photocatalytic decarboxylative alkenylation reactions of N-(acyloxy)phthalimide derived from α-amino and α-hydroxy acids with 1,1-diarylethene, and with cinnamic acid derivatives through double decarboxylation, using sodium iodide and triphenylphosphine as redox catalysts. The reaction proceeds under mild irradiation conditions with visible blue light (440 nm or 456 nm) in an
A Novel Synthesis of N-But-3-enyl-α- and β-Amino Acids
作者:Andrew Hughes、T. Van Nguyen、Robert Brownlee
DOI:10.1055/s-0028-1088072
日期:2009.6
N-But-3-enyl-α- and β-aminoacids can be prepared by cleaving 1,3-oxazolidin-5-ones and 1,3-oxazinan-6-ones in the presence of allylsilanes and boron trifluoride etherate at room temperature in good to excellent yields. 1,3-oxazolidin-5-ones - 1,3-oxazinan-6-ones - amino acids - allylations - Lewis acids
Aza variant of intramolecular nucleophile-catalyzed aldol lactonization (NCAL): formal synthesis of (3S,4R) and (3R,4S) 4-(hydroxymethyl)pyrrolidin-3-ol
作者:Dimpy Sikriwal、Dinesh K. Dikshit
DOI:10.1016/j.tet.2010.10.085
日期:2011.1
Aza variant of intramolecularcatalytic, asymmetricnucleophile-catalyzed, aldol lactonization (NCAL) reaction has been explored to synthesize β-lactone fused nitrogen heterocycles as aza sugars’ precursors by employing achiral amino acids. The utility of these bicyclicβ-lactones is presented by the formal synthesis of aza sugars, (3S,4R) and (3R,4S) 4-(hydroxymethyl)pyrrolidin-3-ol.