Okushi, Tsuneo published the artcileReaction of triphenylboroxine with diethyl ethylidenemalonate in the presence of bis(ethoxycarbonylacetonato)copper(II), Safety of Copper(II) ethylacetoacetate, the publication is Nippon Kagaku Kaishi (1975), 1435-8, database is CAplus.
The reaction of triphenylboroxine with di-Et ethylidenemalonate in the presence of bis(ethoxycarbonylacetonato)copper(II) was investigated. When the reaction was carried out in pyridine, Cu powder precipitated and Cu(I) pentaborate-pyridine(1/6) crystallized From the filtrate, benzene (69.7%), biphenyl (13.9%) and 1-phenylethylmalonic acid (7.5%) were obtained. Several byproducts were also identified. Possible pathways for the formation of these products were suggested. The formation of biphenyl and 1-phenylethylmalonic acid was explained by a radical mechanism. By use of a large excess of di-Et ethylidenemalonate as solvent, 1-phenylethylmalonic acid was obtained in a 55.7% yield.
Nippon Kagaku Kaishi published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Safety of Copper(II) ethylacetoacetate.
Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”