Selective reductive dimerization of phenylacetaldehyde to 2,4-diphenylbutanal catalysed by novel dirhodium complexes

Metallic Ag arrays assembled in nanoporous VSB-5 nanocrystals by a simple method: A novel catalyst for the synthesis of olefin aldehyde from styrene

“…However, sample A was transformed into sample B as the reaction was processed, and this may be due to adequate phenylacetaldehyde produced. It is known that alkalescence favors the aldol-type reaction to the yield selectivity of a new aldehyde [29]. The alkalescence of VSB-5 together with Ag(0) nanoclusters assembled in the channel of VSB-5 facilitated the aldol reaction and the formation of the oligomeric products.…”

“…The styrene oxidation at side chain is of academic and commercial interests for the synthesis of two important products of styrene oxide and of phenylacetaldehyde [28]. While phenylacetaldehyde could be further polymerized to produce oligomeric aldehyde using costly Wilkinson's catalyst (RhCl(PPh 3 ) 3 ) or other dirhodium complexes catalysts [29], which is interesting in the organic chemical industry. The reaction was generally carried under a high pressure of 11 MPa with a complex process and the selectivity of the new oligomeric aldehyde was lower than 20%.…”

“…However, the reaction conditions required in the experiment was rather mild (70°C) and simple in comparison with traditional aldol reactions which required high pressure or complex experiment conditions. Additionally, the novel olefin aldehyde was directly synthesized from styrene compared to those reacting with phenylacetaldehyde using metallocene as catalyst [29].…”