Regioselective Propargylation of Aldehydes and Ketones by Electrochemical Reaction using Zinc and Aluminum Anodes
作者:Nobuhito Kurono、Kazuya Sugita、Masao Tokuda
DOI:10.1016/s0040-4020(99)01089-3
日期:2000.2
Electrochemical propargylation of aldehydes and ketones with unsubstituted or α-substituted propargylic bromides using platinum cathode and zinc anode proceeded efficiently under mild conditions to give the corresponding homopropargyl alcohols exclusively in high yields. Similar electrochemical propargylation with γ-substituted propargyl bromides gave the corresponding homoallenyl alcohols as major
CO<sub>2</sub>-Activation for γ-Butyrolactones and Its Application in the Total Synthesis of (±)-Heteroplexisolide E
作者:Suhua Li、Shengming Ma
DOI:10.1002/asia.201200467
日期:2012.10
is described. The catalyst is highly active and can be applied for the synthesis of (optically active) mono‐ or bicyclic α‐alkylidene‐γ‐butyrolactones with excellent regio‐ and stereoselectivity and good functional group tolerance. The potential of the reaction has been demonstrated in the first synthesis of (±)‐heteroplexisolide E.
Gold(I)-Catalyzed [4+2] Annelation/Nucleophilic Addition Sequence: Stereoselective Synthesis of Functionalized Bicyclo[4.3.0]nonenes
作者:Sebastian Böhringer、Fabien Gagosz
DOI:10.1002/adsc.200800413
日期:2008.11.3
The gold(I)-catalyzed isomerization of readily available 1,8-dien-4-ynes allows the rapid construction of a variety of synthetically useful bicyclo[4.3.0]nonenes by a stereoselectivesequence involving a [4+2] annelation/nucleophilicaddition process.