An example is the synthesis of dibenzylideneacetone ..

Dibenzylideneacetone - Wikipedia
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Dibenzylideneacetone | C17H14O | ChemSpider

The direct and selective synthesis of phenols from aryl/heteroaryl halides and KOH has been achieved through the use of highly active monophosphine-based catalysts derived from Pd2dba3 and ligands L1 or L2 and the biphasic solvent system 1,4-dioxane/H2O. We have also demonstrated a one-pot method of phenol formation/alkylation for the preparation of alkyl aryl ethers from aryl halides. In many instances, this protocol overcomes limitations in existing Pd-catalyzed coupling reactions of aliphatic alcohols with aryl halides. Finally, we demonstrate that substituted benzofurans can be prepared efficiently via a Pd-catalyzed phenol formation/cyclization protocol starting from 2-chloroaryl alkynes.

Synthesis of Dibenzalacetone. Purpose: To synthesize dibenzalacetone via an Aldol condensation reaction (See Handout for mechanism) Reaction Equation
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Crystal and molecular structure of tris(dibenzylideneacetone) ..

Tris(dibenzylideneacetone)dipalladium (Pd2(dba)3) is ubiquitously used as a source of soluble Pd species for catalysis and as a precursor in the synthesis of more complex Pd structures. In spite of the massive usage of this convenient Pd complex, its nature in solution has not been revealed in detail and the applications rely on the assumed state and purity of the compound. In the present study we have developed a convenient NMR procedure to reveal the nature of Pd2(dba)3 and to determine the purity of the complex. Surprisingly, it was found that commercially available samples of Pd2(dba)3 may readily contain up to 40% of Pd nanoparticles in a wide range of sizes (10–200 nm). The study has shown that the routinely accepted practice of utilization of Pd2(dba)3 without analysis of the purity (both commercially available and prepared by common procedures) can introduce significant errors in the estimation of catalyst efficiency and lead to incorrect values of TON, TOF, and reported mol % values in the catalytic procedures. The presence of Pd nanoparticles in the catalyst precursor provides an opportunity for heterogeneous catalytic systems of different nature to be directly accessible from Pd2(dba)3. In the present study we report a modified procedure for the synthesis of Pd2(dba)3·CHCl3 with 99% purity.

Structure, properties, spectra, suppliers and links for: Dibenzylideneacetone, 538-58-9.
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The reactions between a ketone and an aldehyde (crossed aldolcondensation) or between two aldehydes also go by the nameClaisen-Schmidt condensation. These reactions arenamed after two of its pioneering investigators and J. G. Schmidt, who independently publishedon this topic in 1880 and 1881. Anexample is the synthesis of .

Synthesis and Characterization of Dibenzalacetone | …
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