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
Stereocontrolled Synthesis of Multisubstituted 1,3-Dienes via an Allene–Claisen Rearrangement
作者:Kenji Matsumoto、Mitsuru Shindo、Naoyuki Mizushina、Masahiro Yoshida
DOI:10.1055/s-0036-1590970
日期:2017.10
stereoselective synthetic method for the preparation of multisubstituted 1,3-dienes via an allene–Claisen rearrangement. The Claisen rearrangement of anti-allenyl alcohols provided (1E,3Z)-1,3-dienes, which are essential components of bongkrekic acid, in high stereoselectivities. To demonstrate the synthetic utility of the resulting 1,3-dienes, further functional transformations and Diels–Alder reactions are