Effects of the reactants concentration in the butadiene telomerization with d-xylose and parallel influence of triethylamine as additive

• Published in: Journal of molecular catalysis. A, Chemical Vol. 244; no. 1; pp. 93 - 98
• Main Authors: Damez, Céline, Estrine, Boris, Bessmertnykh, Alla, Bouquillon, Sandrine, Hénin, Françoise, Muzart, Jacques
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.02.2006; Elsevier; Elsevier [1995, Vol. 95, n° 1-janvier 2017, vol. 426, part B]
• Subjects: Amine additives; Catalysis; Chemical Sciences; Chemistry; Concentration effects; Exact sciences and technology; General and physical chemistry; Palladium; Telomerization; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Xylopyranosides; Amine additives; Concentration effects; Palladium; Xylopyranosides; Telomerization; Hydrocarbon; Palladium Complexes; Transition metal Complexes; Dienic compound; Butadiene; Xylose; Additive; Concentration effect; Tertiary amine; Platinoid Complexes
• ISSN: 1381-1169; 1873-314X
• DOI: 10.1016/j.molcata.2005.08.041

Better conversions and selectivities with NEt 3 at low xylose concentrations. No more influence of NEt 3 at high xylose and butadiene concentrations. ▪ The efficiency and the selectivity of the palladium-catalyzed telomerization of butadiene with d-xylose in DMF were strongly dependent on the presence of triethylamine as additive for low sugar concentrations. The amine influence, which would mainly be due to its both basic and coordinating properties, disappeared at high sugar concentrations. The selectivity towards the monografting could reach 98% at 50% sugar conversion (with 82% of linear isomers) and could be maintained at 71% at 96% conversion (with a similar ratio of linear isomers).