The Electrochemical
<i>cis</i>
‐Chlorination of Alkenes
作者:Julia Strehl、Cornelius Fastie、Gerhard Hilt
DOI:10.1002/chem.202103316
日期:2021.12.9
Double role: The cis-chlorination of alkenes is realised in an electrochemical setup with PhSeCl as catalyst. The supporting electrolyte (TBACl) acts as nucleophilic reagent for the SN2-type replacement of selenium versus chloride in the key step of the process while the PhSeCl-alkene adduct is activated by electrochemically generated PhSeCl3.
双重作用:烯烃的顺式氯化是在以 PhSeCl 作为催化剂的电化学装置中实现的。在该过程的关键步骤中,支持电解质(TBACl)充当硒与氯的S N 2 型取代的亲核试剂,同时PhSeCl-烯烃加合物被电化学产生的PhSeCl 3活化。
Hydrolytic selenoxide elimination reaction for the preparation of 2-chloro-1-olefins
作者:Lars Engman
DOI:10.1016/s0040-4039(00)95954-9
日期:——
from terminal olefins by a sequence involving Markownikoff-addition of PhSeCl, chlorination of the resulting β-chloroalkyl phenyl selenides with SO2Cl2 and, after recrystallization, hydrolysis/selenoxideelimination in a two-phase system.
Pummerer-like reaction of selenium(IV)-dichlorides. Synthesis of α-chloro-α-phenylselenenylketones and α,α-dichloro-α-phenylselenenylketones
作者:Lars Engman、Joachim Persson、Ulf Tilstam
DOI:10.1016/s0040-4039(00)99093-2
日期:1989.1
Selenium(IV)-dichlorides , readily available by treatment of methyl ketones with phenylselenium trichloride or selenium tetrachloride, were treated in methylene chloride with pyridine to give α-chloroselenides in a Pummerer-like reaction. Sulfurylchloridechlorination of these materials and repeated pyridine treatment similarly afforded α,α-dichloroselenides .
A novel route to cyclic imines based on 5-exo radicalcyclization is explored. The radical precursors are imines prepared from allylamine and readily available α-phenylselenenyl ketones.
Phenyl selenium trichloride in synthesis. Reaction with ketones. A new variation of the selenoxide elimination reaction
作者:Lars Engman
DOI:10.1016/s0040-4039(01)84605-0
日期:——
Phenyl selenium trichloride was used for the introduction of a PhSeCl2-group into the α-position of ketones. These products were converted to enones (hydrolysis/selenoxide elimination) or α-phenylselenoketones (thiourea-reduction).