Synthesis of cyclopentenones and butenolides by reaction of the lithium salt of P,P-diphenyl-P-(alkyl)(N-phenyl)phosphazenes with electrophilic double and triple bonds

1. Álvarez-Gutiérrez, J.M.
2. López-Ortiz, F.
3. García-Granda, S.
4. Rodríguez-González, A.