The convenient syntheses of a few methyl 2-(1-amino)alkenyl thiazoline-4-carboxylates and methyl 2-[2-(1-amino)ethenyl-bithiazolyl] thiazoline-4-carboxylate have been accomplished. The latter is an important partial skeleton of macrobicyclic peptide antibiotic cyclothiazomycin.
Synthesis of Cytimidine through a One-Pot Copper-Mediated Amidation Cascade
作者:Catherine M. Serrano、Ryan E. Looper
DOI:10.1021/ol2018196
日期:2011.10.7
A concise synthesis of cytimidine was developed utilizing tandem Cu-mediated N-aryl amidations followed by global deprotection. This sequence exploits a regioselective coupling of an iodobenzamide with a halopyrimidine that allows the union of three fragments in a single synthetic manipulation and will permit the efficient and rapid diversification of the cytimidine core.
Chiral Ligands Containing Heteroatoms; 12.<sup>1</sup>Synthesis of Optically Active 2-Amino-2-(2′-pyridyl)-1-alkanols from β-Hydroxy-α-amino Acids
The synthesis of a new class of optically active ligands such as the title compounds is presented. All the multistep procedures adopted start by the conversion of L-serine and L-threonine into the proper 2,2-dimethyloxazolidines, followed by transformation of the corresponding nitriles to pyridines. The reaction sequence occurs without loss of enantiomeric purity and with overall satisfactory yield.