About: Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes

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About: Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. 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)
Title	Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes (en)
skos:prefLabel	Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes Chiral cobalt(I) and nickel(0) complexes in the synthesis of nonracemic helicenes through the enantioselective [2+2+2] cyclotrimerisation of alkynes (en)
skos:notation	RIV/61388963:_____/13:00391515!RIV14-MSM-61388963
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(IAA400550916), P(LC512)
http://linked.open...iv/cisloPeriodika	Jan 1
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Starý, Ivo Stará, Irena G. Andronova, Angelina
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav organické chemie a biochemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	65286
http://linked.open...ai/riv/idVysledku	RIV/61388963:_____/13:00391515
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	asymmetric catalysis; helicene; cycloisomerisation; alkyne (en)
http://linked.open.../riv/klicoveSlovo	asymmetric catalysis alkyne cycloisomerisation helicene
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[CBE0DB50228B]
http://linked.open...i/riv/nazevZdroje	Journal of Organometallic Chemistry
http://linked.open...in/vavai/riv/obor	CC
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Azahelicenes: Their Synthesis, Properties and Use Center for biomolecules and complex molecular systems
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	723
http://linked.open...iv/tvurceVysledku	Andronova, Angelina Stará, Irena G. Starý, Ivo Fischer, C. Hapke, M. Heller, B.
http://linked.open...ain/vavai/riv/wos	000311680100014
issn	0022-328X
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jorganchem.2012.07.005

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