TBAF-catalyzed [3 + 2]cycloaddition of TMSN3 to 3-nitrocoumarins under SFC: an effective green route to chromeno[3,4-d][1,2,3]triazol-4(3H)-ones
Abstract
Tetrabutylammonium fluoride (TBAF) has been shown to catalyze very efficiently the [3 + 2] cycloaddition of trimethylsilyl azide (TMSN3) to variously substituted 3-nitrocoumarins under SFC. A novel class of chromeno[3,4-d][1,2,3]triazol-4(3H)-ones has been prepared in high yields and following an environmentally-friendly protocol.