Alkyl and Aryl Thiol Addition to [1.1.1]Propellane: Scope and Limitations of a Fast Conjugation Reaction
作者:Robin M. Bär、Stefan Kirschner、Martin Nieger、Stefan Bräse
DOI:10.1002/chem.201704105
日期:2018.1.26
carboxy‐, amino‐ and nitro‐substituted thiols could be added to 1 with few by‐products in 16–90 % yield. Oxidation of the products allows tuning of the polarity and subsequent reactions of the products. The click‐type reaction proceeds even faster with selenols, as was shown in a proof of concept. Thiol addition to 1 offers a facile tool for surface modification, conjugation and tuning of hydrophilicity in
本文报道了在[1.1.1]丙炔(1)的应变碳-碳键中添加不同的硫醇。研究了该反应途径,与取代的硫醇,硫化氢和保护的半胱氨酸进行了加成反应,并验证了产物的进一步修饰。干净的反应通过自由基链过程进行,这已通过不同的氘标记实验得到证实。它显示出很高的官能团耐受性,因为可以将卤代,羟基,甲氧基,羧基,氨基和硝基取代的硫醇添加到1副产物很少,收率为16–90%。产物的氧化允许调节极性和产物的后续反应。如概念证明所示,使用硒醇时,点击型反应的进行速度甚至更快。硫醇1的添加为生物和药物化学中的表面改性,缀合和亲水性调节提供了便捷的工具。