Efficient Synthesis of 1,2,4-Dithiazolidine-3,5-diones [Dithiasuccinoyl-Amines] from Bis(chlorocarbonyl)disulfane Plus Bis(trimethylsilyl)amines
作者:Michael J. Barany、Robert P. Hammer、R. B. Merrifield、George Barany
DOI:10.1021/ja0455446
日期:2005.1.1
dithiasuccinoyl (Dts)-amine, serves as a readily removable amino protecting group for building blocks used in syntheses of peptides, glycopeptides, and PNA; it is also useful as a masked isocyanate and (inversely) as a sulfurization reagent for trivalent phosphorus. Bis(chlorocarbonyl)disulfane, the two-sulfur analogue of succinyl chloride, has been envisioned as a reagent for facile single-step elaboration of the
1,2,4-二噻唑烷-3,5-二酮杂环,也称为二硫代琥珀酰 (Dts)-胺,作为一种易于去除的氨基保护基团,用于合成肽、糖肽和 PNA 的结构单元;它也可用作掩蔽异氰酸酯和(相反)用作三价磷的硫化试剂。双(氯羰基)二硫烷是琥珀酰氯的双硫类似物,已被设想为用于轻松单步制备杂环的试剂。然而,由于所讨论的原因,双(氯羰基)二硫烷直接与伯胺反应不能产生 Dts-胺。受到有机硅化学文献中的几个先例的启发,即三甲基甲硅烷基可以作为“大质子”,成功地,已开发出通过双(氯羰基)二硫烷与双(三甲基甲硅烷基)胺反应制备 Dts-胺的高产率方法。还介绍了旨在阐明这些观察结果的机械原因的研究。