A new method for the addition of SF5Cl on unsaturated compounds was developed, based on the use of an electron donor-acceptor (EDA)-complex and visible light irradiation. The reaction does not require the presence of oxygen to proceed, compared to the most-common SF5Cl addition protocols. A total of 19 examples of alkenes and alkynes were performed, with yields ranging from 31 % to 86 %.
The SF5Cl radicaladdition on unsaturated compounds was performed using an air-stable amine–borane complex as the radical initiator. This method showed to be complementary to the classic Et3B-mediated SF5Cl addition on alkenes and alkynes. A total of seven alkene and three alkyne derivatives were tested in the reaction, with yields ranging from 3% to 85%.
使用空气稳定的胺-硼烷络合物作为自由基引发剂,在不饱和化合物上进行SF 5 Cl自由基加成。该方法显示出与经典的 Et 3 B 介导的 SF 5 Cl 加成对烯烃和炔烃的补充。该反应共测试了7种烯烃和3种炔烃衍生物,收率在3%至85%之间。
A Mild and Efficient Synthesis of Buta-1,3-dienes Substituted with a Terminal Pentafluoro-λ6-sulfanyl Group
An efficient four-step route towards the synthesis of conjugated 1,3-dienes substituted with a terminal SF5-group was proposed. Key steps of the synthetic sequence are the bromination of 1-(pentafluoro-λ6-sulfanyl)alk-1-enes followed by dehydrobromination of the corresponding products.