Straightforward synthesis of tri- and tetra-substituted 3-trifluoromethylfurans by heterocyclization reaction of perfluoroketene dithioacetals
Abstract
Various 2-ethylsulfanyl-3-trifluoromethylfurans were obtained, in moderate to good yields, using a two-step procedure, from perfluoroketene dithioacetals as starting materials. Reaction tolerated a large variety of substituents on the furan nucleus. Mechanism of cyclization was also proposed based on the electronic properties of aryl and heteroaryl substituents.