Synthesis of cyclic acetals by hydroformylation of oct-1-ene in the presence of polyols
作者:D. N. Gorbunov、S. V. Egazaryants、Yu. S. Kardasheva、A. L. Maksimov、E. A. Karakhanov
DOI:10.1007/s11172-015-0959-6
日期:2015.4
Rhodium-catalyzed hydroformylation of oct-1-ene in acid medium in the presence of polyols gives acetals of the initially formed aldehydes. The use of water-soluble trisodium salt of tris(sulfonatophenyl)phosphine as a ligand favors easy separation of the reaction products and enables repeated use of the catalytic system. A minor additive (2 wt.%) of the obtained acetal mixture improves the lubricating
Tandem hydroformylation–acetalization with a ruthenium catalyst immobilized in ionic liquids
作者:Jakob Norinder、Claudia Rodrigues、Armin Börner
DOI:10.1016/j.molcata.2014.04.009
日期:2014.9
For the first time, a ruthenium catalyzed hydroformylation acetalization reaction of olefins is presented. The tandem reaction proceeds well with 1,2- or 1,3-diols, trapping the intermediary formed aldehydes as cyclic acetals. In this manner the hydrogenation of the aldehydes to the corresponding alcohols usually observed with Ru catalysts is prevented. The optimized catalytic system consisting of Ru catalyst, ionic liquids, acetic acid and ammonium salt can be recycled and reused for at least two further runs. Interestingly, styrenes as substrate give preferentially terminal acetals. (C) 2014 Elsevier B.V. All rights reserved.
Alkoxylated glycerol acetals and their derivatives
申请人:Cognis IP Management GmbH
公开号:EP2305662B1
公开(公告)日:2013-01-23
Murza, M.M.; Gorbenko, M.M., Russian Journal of Organic Chemistry, 1993, vol. 29, # 9.2, p. 1551 - 1554