Synthesis of novel 3-[(1-glycosyl-1H-1,2,3-triazol-4-yl)- methylamino]ket-2-en-1-ones
作者:Banty Kumar、Jyotirmoy Maity、Amit Kumar、Vinod Khatri、Bhawani Shankar、Ashok K. Prasad
DOI:10.1007/s10593-018-2274-2
日期:2018.3
by Sonogashira reaction of substituted acetylenes and benzoyl chloride followed by Michael-type addition of propargylamine to the resulting substituted alkynes in good yields. The precursor azido sugars, 1-azido-2,3,5-tri-O-benzoyl-β-D-ribofuranose and 2,3,4,6-tetra-O-acetyl-1-azido-β-D-glucopyranose, were synthesized by azidation of 1-O-acetyl-2,3,5-tri-O-benzoyl-β-D-ribofuranose and β-D-glucopyranose
Facile synthesis of heavily-substituted alkynylpyridines via a Sonogashira approach
作者:Yilmaz Kelgokmen、Metin Zora
DOI:10.1039/c5ra21701f
日期:——
A robust synthesis of highly-substituted alkynylpyridines via a Sonogashira approach is described, providing a library of functionalized pyridines for biological studies.
A transition-metal-free synthesis of pyridine derivatives by 6-endo-dig cyclization of N-propargyl enamines was developed. This method is environmentally friendly and is a high atom economy reaction that is easily accessed to provide pyridine derivatives in moderate to good yield by heating N-propargyl enamines in solvent without additives. The total synthesis of onychine was achieved in 51% yield