A Stereoselective Synthesis of Sugar-Derived Chiral β-Lactams
作者:Rama Kanwar Khangarot、Krishna P. Kaliappan
DOI:10.1002/ejoc.201100953
日期:2011.10
strategy. In this article, the synthesis of a variety of chiralβ-lactams by the Kinugasa reaction between terminal alkynes and nitrones is described. These sugar-derivedβ-lactams were synthesized by the reaction between cyclic nitrones derived from different sugars, tartrate ester, and alkynes obtained from different sugars. The reaction gave moderate to good yields of β-lactams with high diastereoselectivity
Concise synthesis of thiophene <i>C</i>-nucleoside analogues bearing sugar residues and aromatic residues through dimerization and sulfur heterocyclization of sugar alkynes and substituted iodoethynylbenzene
The synthesis of thiophene C-nucleoside analogues bearing sugar residues (mono- and disaccharides) and aromatic residues has been achieved by symmetric dimerization of terminal sugar alkynes or unsymmetric dimerization of terminal sugar alkynes and substituted iodoethynylbenzene followed by sulfur heterocyclization in one pot. Homocoupling of terminal sugar alkynes and subsequent sulfur heterocyclization