Transformations in the Isoxazole Series: Synthesis of Substituted 2-Aminothiazoles
作者:Alfons Pascual
DOI:10.1002/hlca.19910740309
日期:1991.5.2
Substitued N-(isoxazol-4-yl)thioureas 1 undergo a transformation in the presence of hexacarbonylmolybdenum and acid to yield functionalized thiazoles 3 in a one-pot reaction. In a few cases, 1,4,5-trisubstituted dihydroimidazolethiones 4 are also isolated as side products. Mechanistic considerations are outlined and scope and limitations of this new methodology discussed.
取代的N-(异恶唑-4-基)硫脲1在六羰基钼和酸的存在下进行转化,以一锅法反应得到官能化的噻唑3。在少数情况下,还分离出1,4,5-三取代的二氢咪唑硫酮4作为副产物。概述了机械方面的考虑,并讨论了这种新方法的范围和局限性。