Synthesis of Tetrasubstituted Vicinal Difluoroolefines

Article abstract of DOI:10.1016/00404-0399(50)09345-

Treatment of α-arylthioacetoacetate with DAST afforded a α,β,β-trifluoroester which upon desulfurization followed by HF elimination gave access to tetrasubstituted vicinal diflioroolefines.