Synthesis of 1,1′-binaphthyls by photo-dehydro-Diels-Alder reactions
1,1′-Binaphthyls are prepared by a conceptually novel approach based on the photo-dehydro-Diels-Alder reaction. The Royal Society of Chemistry 2006.
Wessig, Pablo,Mueller, Gunnar
p. 4524 - 4526
(2008/09/18)
Synthesis of γ- and δ-Lactones by Free-Radical Annelation of Se-Phenyl Selenocarbonates
A general method for the synthesis of γ- and δ-lactones through the intramolecular addition of alkoxycarbonyl radicals, formed by reaction of Se-phenylselenocarbonates with n-Bu3SnH, onto carbon-carbon multiple bonds is described.This free-radical cyclization is characterized by high regioselectivity favoring exo addition and by a high ratio of cyclization to reduction.Monocyclic, fused bicyclic, and spirocyclic lactones are formed in good to excellent yield.Use of allyltri-n-butyltin as a chain-transfer agent in the place of n-Bu3SnH affords the corresponding 3-butenyl lactones.
Bachi, Mario D.,Bosch, Eric
p. 4696 - 4705
(2007/10/02)
SYNTHESIS OF α-ALKYLIDENE-γ-LACTONES BY INTRAMOLECULAR ADDITION OF ALKOXYCARBONYL FREE-RADICALS TO ACETYLENES
α-Alkylidene-γ-lactones are obtained by treatment of chloroformate and selenocarbonate derivatives of homopropargylic alcohols with tri-n-butylstannane.
Bachi, Mario D.,Bosch, Eric
p. 641 - 644
(2007/10/02)
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