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Conjugated dienes numbering carbon atoms

Satisfactory to good yields of adducts have been found for styrenes [Eq. (21a), Y = phenyl], conjugated dienes (Y = vinyl), enamines (Y = NR2), and enol ethers (Y = alkoxy), particularly if they are unsubstituted at the 6-carbon atom to Y. Nonactivated alkenes react less satisfactorily. In the oxidation of anionized 1,3-dicarbonyl compounds (Table 11, numbers 1-8) at potentials between 0.6 and 1.4 V (SCE) and in the presence of butadiene, only the additive dimer LXII is obtained in the presence of ethyl vinyl ether only the disubstituted monomers LXVI or LXVII arise, but with styrene both types of products LXII and LXVI are formed. This result indicates that the primary adduct LXIII is oxidized rapidly between 0.6 to 1.4 V to the carbenium ion in the case of an ethoxymethyl radical (Y = OEt), and slowly in the case of an allyl radical (Y = vinyl). [Pg.943]


See other pages where Conjugated dienes numbering carbon atoms is mentioned: [Pg.81]    [Pg.114]    [Pg.1064]    [Pg.81]    [Pg.417]    [Pg.1236]    [Pg.1256]    [Pg.47]    [Pg.1064]    [Pg.1236]    [Pg.401]    [Pg.106]    [Pg.104]    [Pg.626]    [Pg.135]   
See also in sourсe #XX -- [ Pg.584 ]




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1,3-Diene, conjugated

Atomic number

Atomic numbering

Atoms number

Atoms: atomic number

Carbon atoms numbering

Carbon atoms, number

Carbon conjugation

Carbon number

Carbon: atomic number

Carbonates, diene

Conjugate 1,3 dienes

Conjugated atom

Conjugation Dienes, conjugated)

Dienes conjugated

Number conjugate

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