nes (β-nitrostyrenes) with aqueous titanium(III) chloride afforded substituted pyrroles in addition to the expected reduction products, oximes and carbonyl compounds. 2-Substituted 1-nitro-2-phenylethenes yielded divinylamine derivatives instead of pyrroles. The reaction mechanism has been rationalized by taking account of the electron transfer from titanium(III) species to the nitro olefins, followed
Additions of organomanganese reagents to conjugated nitroolefins
作者:I.N.N. Namboothiri、Alfred Hassner
DOI:10.1016/0022-328x(96)06150-5
日期:1996.7
Additions of organomanganese reagents to aromatic and aliphatic conjugated nitroolefins were examined for the first time. In most cases reaction proceeded rapidly at -30 degrees C. Unlike Mn reagents lacking beta-hydrogens (Me, Ph), which lead to oxidative coupling and reductive dimerisation of nitrostyrenes, benzylmanganese chloride gives 1,4-addition in yields exceeding Grignard or Cu-assisted additions. At 0 degrees C alkyl(Bu, Pr)-manganese reagents undergo an addition-migration-elimination process with nitrostyrenes providing a convenient and stereospecific entry into arylated trans-olefins.
Seebach,D. et al., Chemische Berichte, 1979, vol. 112, p. 234 - 248
作者:Seebach,D. et al.
DOI:——
日期:——
Fujise et al., Chemische Berichte, 1935, vol. 68, p. 1272,1275