Traceless solid-phase synthesis of 2,5,6,7-tetrasubstituted thiazolo[4,5-b]pyridine derivatives is described. Thorpe-Ziegler type cyclization of solid supported cyanocarbonimidodithioate with alpha-halo ketones afforded thiazole resin, which were converted to the desired thiazolopyridine resin by the Friedlander protocol under microwave irradiation conditions. After oxidation of sulfides to sulfones
                                    描述了2,5,6,7-四取代的
噻唑并[4,5-b]
吡啶衍生物的无痕固相合成。用α-卤代酮对固体负载的
氰基碳亚
氨基二
硫代酸酯进行Thorpe-Ziegler型环化反应,得到
噻唑树脂,并通过Friedlander方案在微波辐射条件下将其转化为所需的
噻唑并
吡啶树脂。在将
硫化物氧化为砜后,用胺进行亲核性的脱磺基取代反应可得到目标
噻唑并[4,5-b]
吡啶衍生物,且总收率良好。