Araliphatic thiols are key molecules for the formation of self-assembled monolayers with high long-range order. If these monolayers shall act as bases for the attachment of other molecules, the respective thiols need to carry suitable functional groups, such as the amino or the pyridine group. Due to their Lewis-basicity, these groups are not compatible with the thiol group under most reaction conditions. Here, an entry into this versatile class of compounds is presented, by using fundamental building blocks in which the thiol groups are protected as triisopropylsilyl sulfides making them compatible with many reagents including Grignard reagents and palladium catalysts. With this strategy at hand, six thiols with bi- and terphenyl backbones, one to three methylene groups, and amino or pyridine head groups became accessible in short reaction sequences.
脂肪族
硫醇是形成具有高长程有序性的自组装单层的重要分子。如果这些单层要作为其他分子的附着基础,相应的
硫醇需要携带合适的功能团,如
氨基或
吡啶基。由于这些功能团具有路易斯碱性,因此在大多数反应条件下,它们与
硫醇基不兼容。本文展示了一种进入这一多功能化合物类别的方法,通过使用基础构建块,其中的
硫醇基被
三异丙基硅基
硫化物保护,使其与许多试剂(包括
格氏试剂和
钯催化剂)兼容。借助这一策略,六种具有双苯基和三苯基骨架的
硫醇,带有一至三个亚甲基基团,以及
氨基或
吡啶头基,可以通过简短的反应序列获得。