A rhodium-catalyzed annulation between ethyl benzimidates and alpha- aroyl sulfur ylides was developed, affording a series of pyrano[4,3,2-ij]isoquinoline derivatives in moderate to good yields with good functional group compatibility. The procedure featured dual ortho-C-H functionalization and dual cyclization in one pot. The optoelectronic properties of those fused heteroarenes were tested by UV/vis and fluorescence spectrometers.
Solid-phase synthesis of 1-substituted 4,5-dihydro-1,2,4-triazin-6-ones
作者:Blanca Martı́nez-Teipel、Enrique Michelotti、Martha J Kelly、Damian G Weaver、Francis Acholla、Kebede Beshah、Jordi Teixidó
DOI:10.1016/s0040-4039(01)01095-4
日期:2001.9
The solid-phase synthesis of 1-substituted 4,5-dihydro-1,2,4-triazin-6-ones from imidate esters and substituted hydrazines is reported. The synthesis starts with the reaction of imidic esters with polymer-bound glycine to form the imidate esters. A rehearsal library of 59 compounds was synthesized.