N-Fluoro-3-ethyl-3-methyl-1,1-dioxo-2,3-dihydro-1H-1λ6-benzo[e]1,2-thiazin-4-one, a new and efficient agent for electrophilic fluorination of carbanions
摘要:
N-Fluoro-3-ethyl-3-methyl-1,1-dioxo-2,3-dihydro-1H-1 lambda(6)-benzo[e]1,2-thiazin-4-one (1) was prepared in good yield by fluorination of the corresponding sultam (3) with FClO3. The sultam (3) was prepared from saccharin (2) in 3 steps. The N-fluorosultam (1), a very stable crystalline solid, was found to fluorinate carbanions readily in good to excellent yields. (C) 1999 Elsevier Science S.A. All rights reserved.