Scandium triflate-catalyzed one-pot domino approach towards general and efficient syntheses of unsymmetrical 9-substituted xanthene derivatives
作者:Ritesh Singh、Gautam Panda
DOI:10.1039/b919666h
日期:——
A general and efficient one-pot cascade/tandem approach to synthesize unsymmetrical 9-aryl/heteroaryl xanthenes has been developed under extremely mild reaction conditions using 10 mol% Sc(OTf)3 as a catalyst. This strategy has been further extended to synthesize 9-(thioaryl) xanthenes through tandem carbon–sulfur (C–S) and carbon–carbon (C–C) bond formation. Novel C–C and C–S bond cleavage promoted
在极其温和的反应条件下,使用10摩尔%的溶液,已开发出一种通用且有效的一锅级联/串联方法,用于合成不对称的9-芳基/杂芳基黄嘌呤。 Sc(OTf)3作为催化剂。该策略已进一步扩展为通过串联合成9-(硫代芳基)黄嘌呤碳–硫 (CS)和 碳–碳(CC)键的形成。新型的C–C和C–S键断裂被促进Sc(OTf)3 在机械调查中也进行了讨论。