3-Alkyl-1,2-cyclopentanediones by Negishi cross-coupling of a 3-bromo-1,2-cyclopentanedione silyl enol ether with alkylzinc reagents : an approach to 2-substituted carboxylic acid γ-lactones, homocitric and lycoperdic acidsPaju, Anne; Kostomarova, Diana; Matkevitš, Katharina; Laos, Marit; Pehk, Tõnis; Kanger, Tõnis; Lopp, MargusTetrahedron2015 / p. 9313-9320 : ill http://dx.doi.org/10.1016/j.tet.2015.10.014