Tetrahedron p. 2391 - 2396 (1981)
Update date:2022-08-04
Topics:
Font, J.
March, P. de
The reaction of (E)-5-bromo-3-penten-2-one with triphenylphosphine affords a 3:1 mixture of two protomeric phosphonium salts: 4-oxo-2-pentenyltriphenylphosphonium bromide and 4-oxo-1-pentenyltriphenylphosphonium bromide, characterized by the 13C NMR spectrum of the mixture.However, the common phosphorane of these salts gives two condensation products with benzaldehyde, corresponding to α- and γ-condensation respectively.
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(1953)
