pH值3 P / I 2的介导的合成N,N- ' ,N “ -取代的胍和2- Iminoimidazolin -4-酮从芳基异硫氰酸酯
摘要:
描述了一种方便的一锅法,用于合成由Ph 3 P / I 2系统介导的无环和环状胍。芳基异硫氰酸酯与胺的顺序缩合,然后进行脱氢硫化和鸟苷化,可能同时导致对称和不对称的N,N ' ,N '' -取代的衍生物。通过串联的胍基化-环化反应,还可以从芳基异硫氰酸酯与氨基酸甲酯的反应中以高收率制备一系列2-iminoimidazolin-4-ones。
pH值3 P / I 2的介导的合成N,N- ' ,N “ -取代的胍和2- Iminoimidazolin -4-酮从芳基异硫氰酸酯
摘要:
描述了一种方便的一锅法,用于合成由Ph 3 P / I 2系统介导的无环和环状胍。芳基异硫氰酸酯与胺的顺序缩合,然后进行脱氢硫化和鸟苷化,可能同时导致对称和不对称的N,N ' ,N '' -取代的衍生物。通过串联的胍基化-环化反应,还可以从芳基异硫氰酸酯与氨基酸甲酯的反应中以高收率制备一系列2-iminoimidazolin-4-ones。
we developed a one-pot synthesis of guanidine directly from isothiocyanate using DIB (diacetoxyiodobenzene) as a desulfurizing agent under micellar conditions in water. Our optimization study revealed that the use of 1 % TPGS-750-M as a surfactant with NaOH as an additive base at room temperature can convert a variety of isothiocyanates and amines into corresponding guanidines in excellent yields (69-95 %)
AbstractA facile and efficient sonochemical method for the preparation of carbodiimides from their corresponding thioureas or ureas was described. Using Ph3P–I2 combination in the presence of triethylamine, various diaryl, aryl–alkyl, as well as dialkyl substituted substrates could be converted into carbodiimides in good-to-excellent yields within short reaction times under mild conditions with simple