Palladium or rhodium compound or complex as isomerization catalystdoi:US4556518 AA new process for producing 13-cis retinoic acid in high yields from the reaction product of a butenolide and a Wittig salt.Robert LucciUSUS4556518 1984年7月16日 1985年12月3日 Hoffmann-La Roche Inc. Preparation ...
This indicates that palladium does not serve as a catalyst in an organometallic reaction, but as a promoter of a free radical chain involving atom transfer. In contrast, an allylic iodide showed no tendency to produce radical chain products when treated with Pd(0)....
ChemInform Abstract: ISOMERIZATION OF HEPTANES OVER A PALLADIUM-ZEOLITE CATALYSTrearrangementshydrocarbons (acyclic compoundsNo abstract is available for this article.doi:10.1002/chin.197520148SAKAI, TOMOYAGOTO, MASAFUMIHATANO, KEIICHIROKATO, MANJIROWILEY‐VCH Verlag GmbHChemischer Informationsdienst...
bond, in what is known asanti-Markovnikov selectivity. Alkenes are shown to react with imides in the presence of a palladate catalyst to generate the terminal imide throughtrans-aminopalladation. Subsequently, olefin isomerization occurs to afford the thermodynamically favoured products. Both the scope...
Hydrogenation, isomerization, carbonylation, oxidation, C-C bond formation.Bis(dibenzylideneacetone)palladium(0) is used as a reagent for the preparation of allylic substituted cyclopentadienes. It acts as a homogeneous catalyst as well as in the alkylation of allyl acetates by various nucleophiles. ...
Palladium(ii)-catalyzed exchange and isomerization reactions. Acc. Chem. Res. 6, 16–24 (1973). Article CAS Google Scholar Catellani, M. & Fagnola, M. C. Palladacycles as intermediates for selective dialkylation of arenes and subsequent fragmentation. Angew. Chem. Int. Ed. 33, 2421–...
The present invention is a re-usable and stable supported catalyst comprising a support, an anchoring agent, and a metal complex of a substantially enantiomerically pure phosphine-aminophosphine ligand. The resulting catalyst is useful for asymmetric catalytic reactions, such as asymmetric hydrogenation ...
We commenced our study by using1aas the model substrate, Pd2(dba)3·CHCl3(5 mol%) as the catalyst precursor, and THF as the reaction solvent. Various chiral ligands (12 mol%) were first investigated (Table1). The desired reaction was very sensitive to the ligand’s structure (entries...
We initiated the migratory allylic functionalization by studying reactions with an acyclic non-conjugated diene1aas the pre-electrophile, diethyl malonate2aas the pronucleophile, and Et3N as the base with a palladium catalyst (Fig.2). A group of chiral ligands were first evaluated for their potentia...
since it may undergo further deliberate synthetic elaboration for different purposes as a R1 R2 + R3 R1 R2 R3 + + Me Me MeOCO2 + b R4 – R5 R6 R4 R5 R6 NOT well-established NOT well-established Allylic approach R5 R6 TM catalyst R4 developing Well-established Path 1 R1 R1 R2 R3 R1...