LEHRICH, FRIEDHELM;HOPF, HENNING, TETRAHEDRON LETT., 28,(1987) N 24, 2697-2700
作者:LEHRICH, FRIEDHELM、HOPF, HENNING
DOI:——
日期:——
The Preparation and Structures of Several Cross-Conjugated Allenes (“Allenic Dendralenes”)
作者:Friedhelm Lehrich、Henning Hopf、Jörg Grunenberg
DOI:10.1002/ejoc.201001508
日期:2011.5
The cross-conjugated allenes ("allenic dendralenes") 2-allenylbuta-1,3-diene (2), 1,1-divinylallene (3, prepared here as the methyl derivative 49), and 1,1-diallenylethene (4) are prepared either by S N 2'-substitution processes from appropriate allenic or acetylenic precursors or by base-catalyzed isomerizations of propargylic substrates. Thermal elimination/isomerization routes to these highly unsaturated