A reaction mixture of β,γ-unsaturatedketone and BF 3 .OEt 2 in CH 3 OH was stirred at room temperature and β-methoxy ketone was produced in high yield. The β-amino ketone was obtained as the major product from a reaction mixture of β,γ-unsaturatedketone, AlCl 3 and Ts-NH 2 in CH 2 Cl 2 at room temperature. This Lewis acid promoted β-substitution reaction mechanism was proposed as that the process
The friedel-crafts reaction of acid chlorides with ethene ; Di-addition and molecular rearrangement
作者:Francis X Bates、John A Donnelly、John R Keegan
DOI:10.1016/s0040-4020(01)80962-5
日期:1991.1
Acid chlorides, complexed with excess aluminiumchloride, reacted with ethene to form 3-methyl-2-buten-1-ones, i.e. rearranged di-addition products having a terminal isoprenoid skeleton, together with the usual β-chloropropanones. The latter were the sole products in the absence of excess catalyst. Acid chlorides containing a suitably situated π-system underwent intramolecular cyclization, e.g. 2-
Synthesis of β-Haloketones by β-Addition Reactions of α,β-Unsaturated Ketones with BX<sub>3</sub>(X = Br, Cl) as Halide Source
作者:Adam Shih-Yuan Lee、Shu-Huei Wang、Yu-Ting Chang
DOI:10.1002/jccs.201300394
日期:2014.3
A series of β‐bromoketones and β‐chloroketones were synthesized by the addition reactions of α,β‐unsaturated ketones under BX3 (X = Br, Cl) and ethylene glycol reaction system. The α,β‐unsaturated ester also was successfully converted to its corresponding β‐bromoester under the reaction condition.