2-Butyl-5-chloro-3<i>H</i>-imidazole-4-carbaldehyde as a new synthon for the synthesis of fused ring heterocycles<i>via</i>intramolecular 1,3-dipolar cycloaddition reactions
作者:S. L. Gaonkar、K. M. Lokanatha Rai
DOI:10.1002/jhet.250
日期:——
was transformed into tricyclic heterocycles by substituting the chlorine atom by an unsaturated thiolate or alkoxide and then converting aldehyde function into 1,3-dipole. Chloramine-T was used as an efficient reagent for the generation of 1,3-dipoles, which resulted the formation of fused ring heterocycles viaintramolecular1,3-dipolarcycloaddition reaction. The method is very useful for the construction