Titanium-catalyzed [6π+2π]-cycloaddition of Si-containing alkynes to bis(1,3,5-cycloheptatriene-7-yl)alkanes
作者:Vladimir A. D'yakonov、Gulnara N. Kadikova、Ramil N. Nasretdinov、Dmitry I. Kolokol'tsev、Usein M. Dzhemilev
DOI:10.1016/j.tetlet.2017.03.057
日期:2017.4
The reaction between Si-containing alkynes and bis(1,3,5-cycloheptatriene-7-yl)alkanes in the presence of the two-component catalyst Ti(acac)2Cl2-Et2AlCl, led to the selective formation of mono- and bis-adducts – 9-[4-(2,4,6-cycloheptatrienyl)alkyl]-8-alkyl(phenyl)bicyclo[4.2.1]nona-2,4,7-triene-7-yl}(trimethyl)silanes and bis(7-trimethylsilyl-8-alkyl(phenyl)bicyclo[4.2.1]nona-2,4,7-triene-7-yl)alkanes
含硅炔烃和双(1,3,5-环庚三烯-7-基)烷烃在二元催化剂Ti(acac)2 Cl 2 -Et 2 AlCl的存在下反应,导致选择性形成单和双加合物– 9- [4-(2,4,6-环庚三烯基)烷基] -8-烷基(苯基)双环[4.2.1] nona-2,4,7-三烯-7-基}(三甲基)硅烷和双(7-三甲基甲硅烷基-8-烷基(苯基)双环[4.2.1]壬娜-2,4,7-三烯-7-基)烷烃的收率为78-86%。通过1 H和13 C NMR光谱确认所获得的环加合物的结构。