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Isochromene chromium complexe

In a related study, Uemura and co-workers obtained planar-chiral isochromene chromium complexes by gold-catalyzed enantioselective cyclization of prochiral (l,3-dihydroxymethyl-2-alkynyl)benzene chromium complexes. " The highest selectivities in this 6-e <3to-dig-hydroalkoxylation were observed in the presence of a chiral cationic gold catalyst prepared in situ from (/ )-xylyl-BINAP(AuC1)2 and AgSbFs. With (/ )-SEGPHOS(AuCl)2 and AgBp4, the enantiomeric product was obtained, albeit with low enantioselectivity. [Pg.496]

Scheme 6 Stereodivergent synthesis of isochromene chromium complexes... Scheme 6 Stereodivergent synthesis of isochromene chromium complexes...
Representative procedure for the enantioselective gold-catalyzed cyclization of (I,3-dihydroxymethyl-2-alkynyl)benzene chromium complexes. (R -Tricarbonyl-(3-methyl-5-hydroxymethyl-lH-isochromene)chromiunP ... [Pg.497]

See other pages where Isochromene chromium complexe is mentioned: [Pg.483]    [Pg.483]    [Pg.257]    [Pg.483]    [Pg.483]    [Pg.257]   
See also in sourсe #XX -- [ Pg.496 ]



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Isochromene chromium complexes

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