The Addition of α,β-Dichloroethyl Ethers to Isoprene

1,2-H Shift in Copper−Chlorocarbenoid Intermediate during CuCl/bpy-Promoted Stereoselective Dechlorination of 2,2,2-Trichloroethyl Alkyl Ethers to (Z)-1-Alkoxy-2-chloroethenes

“…Trichloroethyl benzyl ether 16: It was prepared by addition of chlorine to 1benzyloxy-2-chloroethene 2a by following a method similar to that reported22 for the preparation of 1,2dichloroethyl benzyl ether with a little modification. A solution of 2a (1.0 g, 0.006 mol) in dry dichloromethane was cooled to -40 to -50 o C. Chlorine gas was passed through the solution at this temperature with vigorous stirring.…”