Three-step synthesis of an array of substituted benzofurans using polymer-supported reagents
作者:Jörg Habermann、Steven V. Ley、René Smits
DOI:10.1039/a904384e
日期:——
achieved by the bromination of acetophenones to α-bromoacetophenones by polymer-supported pyridiniumbromideperbromide (PSPBP). The subsequent clean substitution of the obtained bromides by phenols using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD-P) and cyclodehydration of the resulting α-phenoxyacetophenones using Amberlyst 15, affords pure products without the need for any chromatographic purification