A new SF5-terminated perfluoroalkyl thiol - SF5(CF2)(6)CH2CH2SH - and a symmetric SF5-terminated dialkyl disulfide - [SF5CHCH(CH2)(8)S](2) - were synthesized from the corresponding SF5-terminated precursors. The chemistry employed in the preparation of the disulfide encompasses high yield pathways for the preparation of new SF5-long chain derivatives. (C) 2001 Elsevier science B.V. All rights reserved.
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 convenient and efficient method for incorporation of pentafluorosulfanyl (SF5) substituents into aliphatic compounds
作者:William R. Dolbier、Samia Aït-Mohand、Tyler D. Schertz、Tatiana A. Sergeeva、Joseph A. Cradlebaugh、Akira Mitani、Gary L. Gard、Rolf W. Winter、Joseph S. Thrasher
DOI:10.1016/j.jfluchem.2006.05.003
日期:2006.10
Both SF5Cl and SF5Br undergo smooth, high yield addition to alkenes and alkynes under the mild free radical chain reaction conditions of triethylborane initiation at low temperature, although the SF5Br chemistry is somewhat limited by its competing high electrophilic reactivity with electron rich alkenes. The SF5Cl addition reaction is relatively insensitive to a wide variety of non-allylic functionalities. (c) 2006 Elsevier B.V. All rights reserved.