- The twofold Heck reaction on 1,2-dihalocycloalkenes and subsequent 6π-electrocyclization of the resulting (E,Z,E)-1,3,5-hexatrienes: A new formal {2+2+2}-assembly of six-membered rings
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1,6-Disubstituted (E,Z,E)-1,3,5-hexatrienes (4 and 5) were prepared by vicinal twofold Heck coupling reactions from 1,2-dibromocyclopentene (1), 1,2-dibromocyclohexene (2), 1,2-diiodocyclopentene (8), 1,2-diiodocyclohexene (9), 1-bromo-2-trifluoromethanes
- Voigt, Katharina,Von Zezschwitz, Paultheo,Rosauer, Keith,Lansky, Annegret,Adams, Amy,Reiser, Oliver,De Meijere, Armin
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p. 1521 - 1534
(2007/10/03)
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- The use of vicinal twofold Heck reaction products in diastereoselective sequential Michael additions - A convenient access to enantiomerically pure six-ring anellated cispentacin derivatives
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The palladium-catalyzed coupling reactions of various acrylic acid derivatives 2a-e (e.g. methyl, tert-butyl, benzyl, menthyl esters) with 1,2-dibromobenzene (1), 1,2,3-tribromobenzene (4) and 1,2-dibromocyclohexene (6) yielded the correspondingly substit
- Voigt, Katharina,Lansky, Annegret,Noltemeyer, Mathias,De Meijere, Armin
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p. 899 - 911
(2007/10/03)
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