Catalyst-free C–S/C–O bond formation: synthesis of novel 4-thio-substituted 2-aryl-4H-chromenes from easily available 2-hydroxychalcones
摘要:
An efficient catalyst-free synthesis of novel functionalized 4-thio-substituted 2-aryl-4H-chromenes from easily available 2-hydroxychalcone derivatives is described. This domino reaction enables successful assembly of two new C-S and C-O sigma bonds in a one-pot operation. (c) 2013 Elsevier Ltd. All rights reserved.