25714-71-0Relevant articles and documents
Assembly of tunable supramolecular organometallic catalysts with cyclodextrins
Leclercq, Loic,Schmitzer, Andreea R.
, p. 3442 - 3449 (2010)
Methylated-β-CDs were used to activate a catalyst by ligand solution trapping, to form second-sphere coordination by ligand complexation, and to increase the regioselectivity of biphasic and homogeneous hydroformylation reactions. Different methylation degrees of the β-CD allow assembly of hydrophobic or hydrophilic catalysts that can be employed in homogeneous or biphasic hydroformylation reactions.
Three-component reductive alkylation of 2-hydroxy-1,4-naphthoquinones with lactols
Kim, Eliana E.,Onyango, Evans O.,Pace, Jennifer R.,Abbot, Timothy M.,Fu, Liangfeng,Gribble, Gordon W.
, p. 864 - 867 (2016)
Lactols II, obtained by DIBAL reduction of their corresponding lactones I, in equilibrium with their hydroxyaldehyde tautomers III were used in a three-component reductive alkylation with 2-hydroxy-1,4-naphthoquinone to give a series of 3-alkylated 2-hydroxy-1,4-naphthoquinone derivatives IV.
Gensler,W.J. et al.
, p. 3408 - 3414 (1968)
Intramolecular oxygen radical additions to α,β-unsaturated esters. Diastereoselective tandem cyclofunctionalization and hydrogen transfer reactions
Guindon, Yvan,Denis, Real C.
, p. 339 - 342 (1998)
The efficiency of a tandem process featuring an oxy radical cyclization and hydrogen transfer reaction of the resultant carbon-based radical has been demonstrated. This methodology affords 2,3-trans-disubstituted tetrahydrofurans by creating two new contiguous stereogenic centers with high levels of 1,2-induction in each step.
Catalytic Selective Oxidation of Primary and Secondary Alcohols Using Nonheme [Iron(III)(Pyridine-Containing Ligand)] Complexes
Caselli, Alessandro,Gallo, Emma,Panza, Nicola,Rizzato, Silvia,Tseberlidis, Giorgio,di Biase, Armando
supporting information, p. 6635 - 6644 (2020/10/30)
The selective oxidation of different primary and secondary alcohols to carbonyl compounds by hydrogen peroxide was found to be catalyzed in conversion ranging from good to excellent by an iron(III) complex of a pyridine-containing macrocyclic ligand (Pc-L), without the need of any additive. The choice of the counteranion (Cl, Br, OTf) appeared to be of fundamental importance and the best results in terms of selectivity (up to 99 %) and conversion (up to 98 %) were obtained using the well-characterized [Fe(III)(Br)2(Pc-L)]Br complex, 4c. Magnetic moments in solid-state, also confirmed in solution ([D6]DMSO) by Evans NMR method, were calculated and point out to an iron metal center in the high spin state of 5/2. The crystal structure shows that the iron(III) center is coordinated by the four nitrogen atoms of the macrocycle and two bromide anions to form a distorted octahedral coordination environment. The catalytic oxidation of benzyl alcohol in acetonitrile was found occurring with better conversions and selectivities than in other solvents. The reaction proved to be quite general, tolerating aromatic and aliphatic alcohols, although very low yields were obtained for terminal aliphatic alcohols. Preliminary mechanistic studies are in agreement with a catalytic cycle promoted by a high-spin iron complex.
PRODUCING BDO VIA HYDROFORMYLATION OF ALLYL ALCOHOL MADE FROM GLYCERIN
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Paragraph 0050, (2019/09/06)
A method including hydroformylating, with syngas, allyl alcohol in an allyl alcohol feed, to produce a hydroformylation product comprising 4-hydroxybutyraldehyde and 3-hydroxy-2-methylpropionaldehyde; and producing a 1,4-butanediol (BDO) product comprising BDO and 1,3-methylpropanediol via hydrogenation of at least a portion of the hydroformylation product. A method including hydroformylating, with syngas, allyl alcohol in a feed comprising bio-allyl alcohol, to produce a hydroformylation product comprising 4-hydroxybutyraldehyde and 3-hydroxy-2-methylpropionaldehyde; and producing a BDO product comprising BDO and 1,3-methylpropanediol via hydrogenation of at least a portion of the hydroformylation product. A method including hydroformylating, with syngas, bio-allyl alcohol in a feed comprising bio-allyl alcohol, to produce a hydroformylation product comprising 4-hydroxybutyraldehyde and 3-hydroxy-2-methylpropionaldehyde; producing a BDO product comprising BDO and 1,3-methylpropanediol via hydrogenation of at least a portion of the hydroformylation product; and removing a byproduct of the production of the bio-allyl alcohol prior to hydroformylating the bio-allyl alcohol and/or from the BDO-product.