通过在路易斯酸存在下结合供体基团和受体基团而活化的双环丙基体系被用作1,6-两性离子的合成等价物。在存在GaI 3 + Bu 4 N + GaI 4的情况下,在2'-芳基-1,1'-双环丙基-2,2-二羧酸酯(DA双环丙基,ABCD)中打开两个环丙烷环–产生5-碘-5-芳基戊二烯基丙二酸酯作为双环丙基系统中HI正式1,6-加成的产物。使用GaCl 3或GaBr 3作为路易斯酸,如末端的芳基或烷基乙炔作为1,6-两性离子拦截剂,可使烷基取代基生长,得到相应的无环7-氯(溴)-庚-2,6-二烯基丙二酸酯。Yb(OTf)3催化ABCD与4-苯基-1,2,4-三唑啉-3,5-二酮(PTAD)的反应也导致两个环丙烷环的打开。反应产物是四氢哒嗪衍生物-(7,9-二氧代-1,6,8-三氮杂双环[4.3.0]非-3-烯-2-基甲基)丙二酸酯-在丙二酸基团中包含一个以上的PTAD部分。
Highly Regio- and Enantioselective Palladium-Catalyzed Allylic Alkylation and Amination of Dienyl Esters with 1,1‘-<i>P,N</i>-Ferrocene Ligands
作者:Wen-Hua Zheng、Na Sun、Xue-Long Hou
DOI:10.1021/ol051882f
日期:2005.11.1
[reaction, structure: see text] Pd-catalyzed asymmetric allylicalkylation of dienyl acetates 1 and amination of allyl acetates 2 provides the corresponding chiral products in high regio- and enantioselectivities using 1,1'-P,N-ferrocenes L1a and L2d as ligands, respectively.
Regio- and enantioselective iridium-catalysed allylic aminations and alkylations of dienyl esters
作者:Gunter Lipowsky、G�nter Helmchen
DOI:10.1039/b311502j
日期:——
Regio- and enantioselective iridium-catalysed allylic aminations and alkylations of dienyl substrates are presented; using phosphorus amidite L1 as ligand, aminations provided ee values of up to 97% and alkylations of up to 90%.
On the regiochemistry of metal-catalyzed allylic alkylation: a model
作者:Barry M. Trost、Ming Hong Hung
DOI:10.1021/ja00334a060
日期:1984.10
Etude des alkylations catalysees par W(CO) 3 (CH 3 CN) 3 des methyl phenyl-5 pentadiene-2,4yl carbonate, acetate de phenyl-1 pentadiene-1,4yle-3 et acetate de phenyl-1 pentadiene-2,4yle a l'aide du malonate de dimethyle
脱烷基化催化剂对 W(CO) 3 (CH 3 CN) 3 脱甲基苯基-5 戊二烯-2,4 基碳酸酯、醋酸酯脱苯基-1 戊二烯-1,4 基-3 和醋酸酯脱苯基-1 戊二烯-2, 4yle a l'aide du 丙二酸二甲基
Regio- and Enantioselective Iridium-Catalyzed Allylic Alkylation with In Situ Activated P,C-Chelate Complexes
作者:Gunter Lipowsky、Nicole Miller、Günter Helmchen
DOI:10.1002/anie.200460016
日期:2004.9.6
Regio- and Enantioselective Molybdenum-Catalyzed Alkylations of Polyenyl Esters