The chemistry of α,β-ditosyloxyketones: new and convenient route for the synthesis of 1,4,5-trisubstituted pyrazoles from α,β-chalcone ditosylates
作者:Om Prakash、Deepak Sharma、Raj Kamal、Rajesh Kumar、Reshmi R. Nair
DOI:10.1016/j.tet.2009.10.001
日期:2009.12
reagents such as phenylhydrazine hydrochloride, semicarbazide hydrochloride and thiosemicarbazide in suitable conditions leads to 1,2-aryl shift, thereby providing a novel route for the synthesis of 1,4,5-trisubstituted pyrazoles.
α,β-查尔酮二甲苯磺酸盐与各种试剂(如盐酸苯肼,氨基脲,氨基脲)和硫代氨基脲的反应在合适的条件下导致1,2-芳基转移,从而为合成1,4,5-三取代的吡唑提供了一条新途径。