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.
Addition of dichlorocarbene to some acyclic trienes
作者:E. W. Duck、J. M. Locke、S. R. Wallis
DOI:10.1039/j39700002000
日期:——
preparation of dichlorocarbene adducts of the following olefins is described: cis- and trans-deca-1,5,9-triene deca-1,trans-4,9-triene, octa-1, trans-3,cis-6-triene, octa-1,trans-3,7-triene, and 5-methylhepta-1,trans-3,6-triene. The relative reactivities of the double bonds towards dichlorocarbene were in the order, conjugated vinyl > conjugated internal > cis > trans > vinyl. The effect of base on some of the
Regiospecific, stereospecific ring closure of alkenylperoxyl radicals generated by oxygenation of benzenethiol–triene mixtures
作者:Athelstan L. J. Beckwith、Rudolf D. Wagner
DOI:10.1039/c39800000485
日期:——
Oxygenation of mixtures of benzenethiol and octa-1,3,6-triene (1a) or 5-methylhepta-1,3,6-triene (1b) with free-radical initiation affords, after treatment of the initial products with triphenylphosphine, the 1,2-dioxolans (9a) and (9b), respectively, via mechanisms involving stereospecific and regiospecificringclosure of the alkenylperoxylradicals (4a) and (4b).