Ruthenium dioxide in fluoro acid medium: I. A new agent in the biaryl oxidative coupling. Application to the synthesis of non phenolic bisbenzocyclooctadiene lignan lactones
Ruthenium (IV) dioxide dihydrate in fluoro acid medium was found to be a very efficient agent for the oxidative coupling of non phenolic lignans and their derivatives, and this method was applied to the total synthesis of (+/-)-neoisostegane 2a and (+/-)-steganolide A 2b. This procedure was also used to obtain the first stereospecific synthesis of a cis-bisbenzocyclooctadiene lactone, the (+/-)-deoxyschizandrin 17, of which, was afforded by a short reduction sequence.
Landais,Robin,Lebrun
p. 3787 - 3804
(2007/10/02)
LE TETRAKIS(TRIFLUOROACETATE) DE RUTHENIUM(IV), NOUVEAU CATALYSEUR A TEMPERATURE AMBIANTE DU COUPLAGE BIARYLIQUE OXIDANT NON PHENOLIQUE-PREMIERE SYNTHESE TOTALE BIOMIMETIQUE DU NEOISOSTEGANE-
In situ generated Ruthenium(IV) tetrakis(trifluoroacetate) -a new organometallic reagent- was used in intramolecular non-phenolic oxydative biaryl coupling of dibenzylbutanolides, and an application to the first total synthesis of neoisostegane was perfor
Landais, Y.,Robin, J.-P.
p. 1785 - 1788
(2007/10/02)
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