. . "3"^^ . "[CBE0DB50228B]" . . "Andronova, Angelina" . "0022-328X" . "Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes"@en . . "Hapke, M." . "RIV/61388963:_____/13:00391515" . "Heller, B." . "000311680100014" . . . . . . "6"^^ . . . "I, P(IAA400550916), P(LC512)" . . . . "723" . "Journal of Organometallic Chemistry" . "Fischer, C." . . . "Star\u00FD, Ivo" . . "5"^^ . "10.1016/j.jorganchem.2012.07.005" . "asymmetric catalysis; helicene; cycloisomerisation; alkyne"@en . "65286" . . "RIV/61388963:_____/13:00391515!RIV14-MSM-61388963" . "Jan 1" . "Star\u00E1, Irena G." . "CH - \u0160v\u00FDcarsk\u00E1 konfederace" . "Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes" . . "The enantioselective intramolecular [2 + 2 + 2] cycloisomerisation of triynes under catalysis by chiral transition-metal complexes (Co-I, Ni-0) in order to receive nonracemic helicene derivatives was explored. The use of the chiral neomenthylindene Co-I complex led to a moderate 25% ee of tetrahydro[6] helicene, which was the first example of such a reaction catalysed by the chiral Co-I complex. The alternative Ni-0 catalysis employing privileged axially chiral monophosphines such as (-)-(aS)-NAPHEP led to tetrahydro [6] helicene with 64% ee, which is among the highest enantiomeric excesses so far observed for this Ni-0-catalysed reaction." . "Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes"@en . . "Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes" . "The enantioselective intramolecular [2 + 2 + 2] cycloisomerisation of triynes under catalysis by chiral transition-metal complexes (Co-I, Ni-0) in order to receive nonracemic helicene derivatives was explored. The use of the chiral neomenthylindene Co-I complex led to a moderate 25% ee of tetrahydro[6] helicene, which was the first example of such a reaction catalysed by the chiral Co-I complex. The alternative Ni-0 catalysis employing privileged axially chiral monophosphines such as (-)-(aS)-NAPHEP led to tetrahydro [6] helicene with 64% ee, which is among the highest enantiomeric excesses so far observed for this Ni-0-catalysed reaction."@en . .