Acyldemetallation of titanium(III) π-allylic complexes
作者:A.N. Kasatkin、A.N. Kulak、G.A. Tolstikov
DOI:10.1016/0022-328x(88)87004-9
日期:1988.5
Titanium(III) π-allyliccomplexes, prepared by the interaction of 1,3-dienes or trienes with Cp2TiCl2 and n-PrMgBr, react with carboxylic acid chlorides RCOCl (R = alkyl, aryl, alkenyl) to give β, γ-unsaturated ketones in high yields. The reaction takes place at the most substituted carbon atom of the π-allylic ligand.
Gas phase thermalisomerizations of twelve acetylenic systems, all of which can in principle undergo two successive pericyclic steps, are described. The substrates, the syntheses and spectroscopic properties of which are presented, are formal derivatives of but-2-yne, with different functional groups in the 1- and the 4-positions. The Cope, Claisen, Claisen ester, retro-ene, 1,5-hydrogen shift, and