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Regioselectivity twisted 1,3-dienes

E. Regioselectivity with Twisted 1,3-Dienes Allylic versus Allene... [Pg.832]

AUantoin, uric acid oxidation, 625 AUene hydroperoxides, regioselectivity with twisted 1,3-dienes, 856-7, 858 Allen s reagent... [Pg.1441]

Scheme 24 Regioselectivity in the photo-oxygenation of twisted 1,3-dienes. Scheme 24 Regioselectivity in the photo-oxygenation of twisted 1,3-dienes.
Reviews of the hula-twist photoisomerization of dienes have been published. New calculations dealing with the isomerism of -cw-butadiene have been reported.Molecular dynamic simulations of the photochemical behaviour of butadiene have shown that cis-trans isomerism occurs. The regioselectivity observed in the photochemical isomerism of trans,trans-l-fluorohexa-2,4-diene is proposed as due to electrostatic control. Direct irradiation of the fluorinated dienes (102) results in preferential conversion to the Z,3E isomers (103). DCA-sensitized irradiation of the butatrienes (104) in various alcohols afford the adducts (105). The simpler alcohols give moderate yields of product, while -butanol affords only a trace of the adduct. ... [Pg.75]

See other pages where Regioselectivity twisted 1,3-dienes is mentioned: [Pg.696]    [Pg.857]    [Pg.857]    [Pg.209]   
See also in sourсe #XX -- [ Pg.858 ]



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