title: Studies on the manganese-mediated isomerization of alkynyl carbonyls to allenyl carbonyls.
abstract: [reaction: see text] A study of the role of base in the isomerization of manganese-coordinated conjugated alkynyl carbonyls to the corresponding allenyl carbonyls is described. The use of phosphine additives indicates that manganese requires a ligand prior to isomerization with amine bases. A series of amine bases were also examined for their efficacy in this isomerization reaction revealing a strong dependence on pK(a). By contrast, potassium tert-butoxide led to rapid isomerization in the absence of added manganese ligand.
authors.affiliation: Department of Chemistry, Florida Atlantic University, Boca Raton, Florida 33431-0991, USA. slepore@fau.edu
authors.forename: Salvatore D
authors.initials: SD
authors.lastname: Lepore
authors.forename: Anita
authors.initials: A
authors.lastname: Khoram
authors.forename: Deborah C
authors.initials: DC
authors.lastname: Bromfield
authors.forename: Pamela
authors.initials: P
authors.lastname: Cohn
authors.forename: Vinod
authors.initials: V
authors.lastname: Jairaj
authors.forename: Maximilian A
authors.initials: MA
authors.lastname: Silvestri
mesh_terms: D002244:Carbon / Q000737:chemistry*; D007536:Isomerism; D008345:Manganese / Q000737:chemistry*
chemical_list: D008345:Manganese; D002244:Carbon