2005
DOI: 10.1021/jo0519965
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Arene−Chromium Tricarbonyl Complexes in the Pauson−Khand Reaction

Abstract: [reactions: see text] We show the use of arene-chromium tricarbonyl complexes in intra- and intermolecular Pauson-Khand reactions. Both styrene and ethynylbenzene complexes react with alkynes and olefins. The synthesis of enynes connected through chromium-complexed aromatic rings is developed. The intramolecular Pauson-Khand reaction occurs in a totally diastereoselective manner.

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Cited by 18 publications
(11 citation statements)
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References 41 publications
(13 reference statements)
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“…The cobalt-alkyne complexes 473a,b reacted in the presence of Grubbs catalyst 428 to give 474 (Scheme 90). 138 The addition of NMO to the crude reaction mixture promoted the Pauson-Khand reaction and provided 475a,b in 81 and 70% yield as mixtures of diastereomers. Similarly, 476 underwent the tandem RCM/PausonKhand to produce 477 in 67% yield.…”
Section: Metathesismentioning
confidence: 99%
“…The cobalt-alkyne complexes 473a,b reacted in the presence of Grubbs catalyst 428 to give 474 (Scheme 90). 138 The addition of NMO to the crude reaction mixture promoted the Pauson-Khand reaction and provided 475a,b in 81 and 70% yield as mixtures of diastereomers. Similarly, 476 underwent the tandem RCM/PausonKhand to produce 477 in 67% yield.…”
Section: Metathesismentioning
confidence: 99%
“…[32] This system has also been formed as minor byproducts of radical homoallylation, [33] insertion of a triple bond into a C À H bond of an olefin in arene-chromium tricarbonyl complexes, [34] and Pd-catalyzed annulation of O-substituted 1,3-dienes. [35] Asymmetric synthesis of trans-pterocarpin: The last stage was to check the applicability of the method to the asymmetric total synthesis of natural pterocarpans.…”
Section: Full Papermentioning
confidence: 99%
“…O composto 53 foi preparado segundo esta seqüência, com excelente rendimento 68 . A reação de RCM pode também ser acoplada, em um processo tandem, com uma reação de Pauson-Khand, constituindo um mé-todo eficiente para a construção de compostos tricíclicos, tais como 54 (sistema [6,5,5]) e 55 (sistema [7,5,5]) em uma única etapa, como mostrado no Esquema 43 69 .…”
Section: Reações De Metátese Em Tandem Com Outras Reaçõesunclassified