Dynamic behavior and reactivity of (1,1,3,3-tetramethylallyl)lithium
作者:Jose Cabral、Gideon Fraenkel
DOI:10.1021/ja00049a044
日期:1992.11
(1,1,3,3-Tetramethylallyl)lithium (1), prepared by cleaving the corresponding phenyl sulfide at -92 o C with lithium 1-(dimethylamino)naphthalenide or by reacting of trimethyltin derivative with CH 3 Li in THF/diethyl ether/TMEDA at -78 o C, adds rapidly to naphthalene and 1-(dimethylamino)naphthalene at -78 o C to give mixtures of the corresponding 1-substituted 1,2- and 1,4-dihydronaphthalenes
(1,1,3,3-四甲基烯丙基)锂 (1),通过在 -92 o C 下用 1-(二甲氨基)萘基锂裂解相应的苯基硫化物或通过三甲基锡衍生物与 CH 3 Li 在 THF/二乙基酯中反应制备乙醚/TMEDA 在 -78 o C 下,在 -78 o C 下快速加入萘和 1-(二甲氨基)萘中,得到相应的 1-取代的 1,2- 和 1,4-二氢萘的混合物
Preparation and remarkable reactivity of the elusive (1,1,3,3-tetramethylallyl)lithium
作者:Jose A. Cabral、Theodore Cohen、Wendel W. Doubleday、Ellen Francis Duchelle、Gideon Fraenkel、Bao Shan Guo、Simon H. Yu
DOI:10.1021/jo00039a031
日期:1992.6
Although traditional methods of allyllithium production failed for (1,1,3,3-tetramethylallyl)lithium, it was readily prepared in a two-pot sequence starting with mesityl oxide. The key step is reductive lithiation of 4-(phenyl-thio)-2, 4-dimethyl-2-pentene with lithium 1-(dimethylamino)naphthalenide. Treating the reductive lithiation Product with trimethylstannyl chloride and the resulting allylstannane with methyllithium in the presence of N,N,N,N-tetramethylethylenediamine provided a solution of the allyllithium free of lithium thiophenoxide. This material adds to anthracene at -78-degrees-C.