A Convenient Synthesis of 2-Sulfanylbenzoselenazole Derivatives via the Reaction of 2-Lithiophenyl Isothiocyanates with Selenium
作者:Kazuhiro Kobayashi、Yuki Yokoi
DOI:10.1002/hlca.201200014
日期:2012.5
been prepared from 2‐bromophenyl isothiocyanates 1. Thus, 2‐lithiophenyl isothiocyanates 2, obtained from 1 and BuLi through Br/Li exchange, reacted with Se at −78° to form lithium benzoselenazole‐2‐thiolates 3, which, upon aqueous workup, afforded benzoselenazole‐2(3H)‐thiones 4. The thiolates 3 were alkylated with reactive alkyl halides and acylated with carboxylic acid chlorides to give 2‐(alkylsul
由2-溴苯基异硫氰酸酯1制备标题化合物。因此,由1和BuLi通过Br / Li交换获得的2-硫代苯基异硫氰酸酯2与硒在-78°下反应形成苯并硒唑-2-硫醇锂3,经水处理后得到苯并硒唑-2(3 H)。硫酮4。硫醇盐3用反应性烷基卤化物烷基化,并用羧酸氯化物酰化,分别得到2-(烷基硫烷基)苯并硒醇5和S-(苯并硒唑-2-基)硫代羧酸盐6。