Préparation de Styrènes α, β Disubstitués

Barbieux, Monique; Martin, R. H.

doi:10.1002/bscb.19640730708

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1964

1967

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Cited by 6 publications

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“…Un travail de synthtse (9) nous a donnt l'occasion de prtparer des tchantillons trks purs de dix-huit styrknes substituks.…”

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Application de la Spectrographie R.M.N. À L'Attribution de Configuration Géométrique: Styrènes Substitués

Barbieux

Defay

Pecher

et al. 1964

Bulletin des Soc Chimique

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SUMMARYThe N.M.R. spectra of five pairs of 4 alkoxy-a, p-dialkylstyrenes of known configuration (general formulae XI and XII) are compared and a set of ru!es suitable for geometric configuration assignmmt in such compounds is deduced:1 . The strong signals in the aromatic AaBz methoxystyrene system are 25-30 CIS apart in the cis isomer and only 13-16 c/s in the trans isomer.2. The olefinic and allylic protons signals are shifted 7-20 c/s downfield in the cis isomer.The origin of the observed shifts is discussed. The configuration of ten new styrene compounds is elucidated by application of these rules.

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“…Un travail de synthtse (9) nous a donnt l'occasion de prtparer des tchantillons trks purs de dix-huit styrknes substituks.…”

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