Stabilization of organosilver(I) compounds, and their application in organic synthesis
作者:H. Westmijze、H. Kleijn、P. Vermeer
DOI:10.1016/s0022-328x(00)92371-4
日期:1979.6
of lithium bromide on the thermal stability of organosilver(I) compounds is described. The stabilized silver(I) compounds have been brought into reaction with conjugated enynes; the regiochemistry of the reactions appears to depend on steric factors. A comparison is presented of the behaviour of the silver(I) and the corresponding copper(I) reagents in this reaction.
Action des organomagnesiens sur les ethers-oxydes propargyliques en presence de bromure cuivreux: synthese de carbures alleniques
作者:Jean-Louis Moreau、Marcel Gaudemar
DOI:10.1016/s0022-328x(00)82136-1
日期:1976.3
Grignardreagents react, in ether and at room temperature, with propargylic ethers, to give allenic hydrocarbons with reasonable yields. The reactions requires catalytic amounts of copper(I) bromide.
格氏试剂在乙醚中和室温下与炔丙基醚反应,以合理的收率得到烯丙烃。该反应需要催化量的溴化铜(I)。
Lewis Acid Promoted Reactions of Ethenetricarboxylates with Allenes: Synthesis of Indenes and γ-Lactones via Conjugate Addition/Cyclization Reaction
Indenes are important core structures in organic chemistry. Few simple arylallenes have been used to construct indene skeletons by Friedel Crafts reaction. Lewis acid catalyzed reaction of ethenetricarboxylates 1 and arylallenes has been examined in this study. The reaction of arylallenes and ethenetricarboxylate triesters with SnCl4 gave indene derivatives efficiently, via a conjugate addition/Friedel-Crafts cyclization reaction. On the other hand, the reactions of 1,1-diethyl 2-hydrogen ethenetricarboxylate and arylallenes or alkylallenes with SnCl4 at -78 degrees C or room temperature and subsequent treatment with Et3N gave gamma-lactones. The reactions of triethyl ethenetricarboxylate and 1,1-dialkylallenes with SnCl4 at room temperature also gave gamma-lactones.
VOSKANYAN, EH. S.;AKOPYAN, O. G.;MKRTCHYAN, A. M.;GASPARYAN, S. M.;SHAXBA+, ARM. XIM. ZH., 41,(1988) N 7, S. 411-415
作者:VOSKANYAN, EH. S.、AKOPYAN, O. G.、MKRTCHYAN, A. M.、GASPARYAN, S. M.、SHAXBA+
DOI:——
日期:——
Allenes. Part XV. The addition of dihalocarbenes to allenes and conversion of 1,1-dihalo-2-methylenecyclopropanes to cumulenes
作者:W. J. Ball、S. R. Landor、N. Punja
DOI:10.1039/j39670000194
日期:——
The addition of dichloro- and dibromo-carbenes to the more substituted double bond of five different allenes gave 1,1-dichloro- and 1,1-dibromo-2-methylenecyclopropanes. Some of these have been converted by means of n-butyl lithium to cumulenes.