Stereoselective hydrozirconation of alkynylsulfide and regioselective synthesis of haloalkenyl sulfide via electrophile-switched halogenation of thioalkenyl zirconocene
摘要:
Stereoselective preparation of alkenyl sulfide was carried out via syn-hydrozirconation of the alkynyl sulfide. Regiochemistry of halogenation of the thioalkenyl zirconocene could be switched by different halides. alpha-Chloroalkenyl sulfide or beta-haloalkenyl sulfide (Br, I) could be obtained by the treatment of NCS or NBS (NIS), respectively. Possible mechanism of halogenation of the thioalkenyl zirconocene was set up herein. (C) 2013 Elsevier Ltd. All rights reserved.
A compound comprising or a pharmaceutically acceptable salt, prodrug, or a metabolite thereof is disclosed herein. Y, A, and B are as described herein. Methods, compositions, and medicaments related to these compounds are also disclosed.