Catalytic [6π+2π]-cycloaddition of Si-containing alkynes to 7-substituted 1,3,5-cycloheptatrienes under the action of Ti(acac)2Cl2–Et2AlCl
作者:Vladimir A. D'yakonov、Gulnara N. Kadikova、Dmitriy I. Kolokol'tsev、Ilfir R. Ramazanov、Usein M. Dzhemilev
DOI:10.1016/j.jorganchem.2015.06.006
日期:2015.10
two-component Ti(acac)2Cl2–Et2AlCl system, resulting in the formation of substituted bicyclo[4.2.1]nona-2,4,7-trienes in high yields, was accomplished. The structures of the obtained compounds were confirmed by 1H, 13C NMR spectroscopy. The reaction mechanism was studied through quantum chemical modeling of the cycloheptatriene and acetylene interaction with TiCl4–Et2AlCl system at the B3LYP/6-31G(d) level
Regioselective [6π+2π] cycloaddition of 1,2-dienes to 7-substituted 1,3,5-cycloheptatrienes catalyzed by Ti(acac)2Cl2—Et2AlCl
作者:G. N. Kadikova、D. I. Kolokoltsev、E. S. Meshcheryakova、V. A. D’yakonov、U. M. Dzhemilev
DOI:10.1007/s11172-016-1283-5
日期:2016.1
A reaction of 7-alkyl-, 7-allyl-, 7-phenyl-1,3,5-cycloheptatrienes with 1,2-dienes in the presence of the two-component catalytic system Ti(acac)2Cl2—Et2AlCl, which led to the formation of practically important substituted endo-bicyclo[4.2.1]nona-2,4-dienes in up to 90% yields, was accomplished for the first time.