73401-51-1Relevant academic research and scientific papers
COMPARATIVE STUDY OF TRIPHENYLAMINE, TRIPHENYLPHOSPHINE, TRIPHENYLARSINE, TRIPHENYLANTIMONY AND TRIPHENYLBISMUTH AS LIGANDS IN THE RHODIUM-CATALYZED HYDROFORMYLATION OF 1-DODECENE
Carlock, John T.
, p. 185 - 188 (1984)
Triphenylamine, triphenylphosphine, triphenylarsine, triphenylantimony and triphenylbismuth were evaluated on the basis of olefin to aldehyde converion, and also on the basis of the normal/iso (n/i) product ratio, as ligands in the rhodium-catalyzed hydroformylation of 1-dodecene.Two series of reactions were conducted which differed only in total reaction time (120 minutes vs 135 minutes) and in the ligand/rhodium ratio (60:1 vs 300:1).Both reactions series employed 35 grams of 1-dodecene, a 176 ppm rhodium charge, 100 psig of 1:1 H2/CO, and a reaction temperature of 90 deg C.In the 60:1 vs 330:1 reaction series, triphenylamine gave olefin conversion and n/i ratios of 2.0 percent, 2.0 vs 5.8 percent, 1.8; triphenylphosphine gave 95 percent, 4.4 vs 86.9 percent, 8.7; triphenylarsine gave 58 percent, 3.1 vs 85.8 percent, 3.5; triphenylantimony gave13.0 percent, 6.1 vs 3.5 percent, 9.1 respectively.Triphenylbismuth failed to promote hydroformylation in both reaction series.These data demonstrate that regiospecificity, as measured by the n/i product ratio, varies inversly to increased ligand basicity.
Aldehydes substituted in alpha position by alkyl residues as odoriferous and aroma substances
-
Page/Page column 10-11, (2010/11/29)
The present invention primarily relates to the use of an aldehyde, substituted in alpha position by an alkyl residue, of the formula having (I) a total of 13 C atoms, wherein R means an unbranched alkyl residue having 6, 7, 8 or 9 C atomsandR′ means an unbranched alkyl residue having 2, 3, 4 or 5 C atoms, or (II) a total of 15 C atoms, wherein R means an unbranched alkyl residue having 8, 9, 10 or 11 C atomsandR′ means an unbranched alkyl residue having 2, 3, 4 or 5 C atoms,or a blend comprising or consisting of two, three or more such aldehydes of type (I) and/or (II),as an odoriferous or aroma substance.
