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Pyrrolizines with electrophiles

Treatment of bis(dimethylaminomethylene)pyrrolizinium perchlorate (29) with cyclopentadiene-NaH in DMF gave the diatropic cyclopenta-[fc]cycl[4,2,2]azine (77), which was also obtained from the fulvene derivative (78) and 3//-pyrrolizine (25). Electrophilic substitutions (deuteration, nitration, nitrosation, acylation, bromination, Mannich reaction) occur in the 6- and 8-positions.32... [Pg.353]

No significant examples of electrophilic attack on. ///-pyrrolizincs were reported since CHEC-II(1996). Nevertheless, treatment of the tricyclic pyrrolizine 53 with aqueous bromine in THF afforded, as expected, the corresponding bromohydrin 54 <1997T4549>. [Pg.9]

The oxime (24) produced from 3H-pyrrolizine (1) with amyl nitrite is probably formed by electrophilic attack <68CB3843>. [Pg.6]

See other pages where Pyrrolizines with electrophiles is mentioned: [Pg.10]    [Pg.822]    [Pg.830]    [Pg.6]    [Pg.9]    [Pg.822]    [Pg.55]    [Pg.57]    [Pg.239]    [Pg.822]    [Pg.822]   
See also in sourсe #XX -- [ Pg.37 , Pg.54 ]



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Pyrrolizine

Pyrrolizines

With Electrophiles

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