Regio- and Stereoselective Synthesis of Multi-Alkylated Allylic Boronates through Three-Component Coupling Reactions between Allenes, Alkyl Halides, and a Diboron Reagent
作者:Yu Ozawa、Kohei Endo、Hajime Ito
DOI:10.1021/jacs.1c06538
日期:2021.9.1
valuable precursors for the rapid and stereoselective construction of densely substituted carbon skeletons. Herein, we report the first synthetic approach for differentially 2,3,3-trialkyl-substituted allylic boronates that contain a stereodefined tetrasubstituted alkene structure. Copper(I)-catalyzed regio- and stereoselectivethree-component coupling reactions between gem-dialkylallenes, alkyl halides
Prop-2-ynyl- and propadienyl-lithium reagents. Regiocontrolled synthesis of allenic compounds
作者:Chanh Huynh、G�rard Linstrumelle
DOI:10.1039/c39830001133
日期:——
Direct proof for the rearrangement of the prop-2-ynyl-lithium (2) into the propadienyl-lithium (4) is provided by the formation of the 1,3-disubstituted alleniccompounds(7).