5-[Amino(thiomethyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione (4) is obtained from 5-[bis- (thiomethyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione (1) and aqueous ammonia in excellent yield. Its reaction with m-chloroperbenzoic acid gives the sulfoxide derivative 5-[amino(sulfinylmethyl) methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione (5). With triphenylphosphine, 5 reacts to give triphenyl( thiomethyl)phosphonium 5-cyano-2,2-dimethyl-1,3-dioxane-4,6-dionate (6) from which the methyltriphenylphosphonium salt 6a is obtained with excess triphenylphosphine. The crystal structures of 4, 5 and 6a are discussed.
5-[氨基(硫代甲基)亚甲基]-2,2-二甲基-1,3-二氧杂环己烷-4,6-二酮(4)是从5-[双(硫代甲基)亚甲基]-2,2-二甲基-1,3-二氧杂环己烷-4,6-二酮(1)和水溶氨反应中制得,收率优异。它与邻氯过苯甲酸反应得到亚砜衍生物5-[氨基(亚砜基硫代甲基)亚甲基]-2,2-二甲基-1,3-二氧杂环己烷-4,6-二酮(5)。与三苯基膦反应,5反应生成三苯基(硫代甲基)膦5-氰基-2,2-二甲基-1,3-二氧杂环己烷-4,6-二酮(6),过量三苯基膦得到甲基三苯基膦盐6a。讨论了4、5和6a的晶体结构。