N-Trifluoroacetylated (N-TFA) sulfoximines react with 1-trifluoromethylstyrenes in a one-pot domino reaction to give fluorinated 5,6-dihydro-1,2-thiazine 1-oxides in good to high yields. The process involves three sequential reaction steps that can be characterized as (1) nucleophilic allylic substitution (SN2′), (2) hydrolysis, and (3) intramolecular nucleophilic vinylic substitution (SNV). The products
N-三
氟乙酰化 ( N -TFA) 亚砜
亚胺与 1-三
氟甲基苯乙烯在一锅式多米诺骨牌反应中反应,以高收率生成
氟化 5,6-二氢-1,2-
噻嗪 1-氧化物。该过程涉及三个连续的反应步骤,可表征为 (1) 亲核烯丙基取代 (SN 2 ')、(2)
水解和 (3) 分子内亲核
乙烯基取代 (SN V )。产品可以通过脱
氟进一步改性。所得产物的分子结构通过X射线晶体学分析确认。