Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
  • C07C29/17—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds
  • C07C29/175—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds with simultaneous reduction of an oxo group
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
  • B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
  • B01J31/24—Phosphines, i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus compounds such as phosphabenzene, phosphole or anionic phospholide ligands
  • B01J31/2404—Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
  • C07C31/02—Monohydroxylic acyclic alcohols
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C33/00—Unsaturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
  • C07C33/02—Acyclic alcohols with carbon-to-carbon double bonds
  • C07C33/025—Acyclic alcohols with carbon-to-carbon double bonds with only one double bond
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
  • B01J2231/60—Reduction reactions, e.g. hydrogenation
  • B01J2231/64—Reductions in general of organic substrates, e.g. hydride reductions or hydrogenations
  • B01J2231/641—Hydrogenation of organic substrates, i.e. H2 or H-transfer hydrogenations, e.g. Fischer-Tropsch processes
  • B01J2231/643—Hydrogenation of organic substrates, i.e. H2 or H-transfer hydrogenations, e.g. Fischer-Tropsch processes of R2C=O or R2C=NR (R= C, H)
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
  • B01J2231/60—Reduction reactions, e.g. hydrogenation
  • B01J2231/64—Reductions in general of organic substrates, e.g. hydride reductions or hydrogenations
  • B01J2231/641—Hydrogenation of organic substrates, i.e. H2 or H-transfer hydrogenations, e.g. Fischer-Tropsch processes
  • B01J2231/645—Hydrogenation of organic substrates, i.e. H2 or H-transfer hydrogenations, e.g. Fischer-Tropsch processes of C=C or C-C triple bonds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
  • B01J2531/80—Complexes comprising metals of Group VIII as the central metal
  • B01J2531/82—Metals of the platinum group
  • B01J2531/821—Ruthenium

Definitions

• the present invention relates to fragrance ingredients and to methods of forming same.
• the present invention relates to a method for producing alcohols from ⁇ , ⁇ - unsaturated aldehydes and ketones.
• a two-step process comprising heating ⁇ , ⁇ - unsaturated aldehydes / ketones containing at least one additional di- and/or trisubstituted carbon - carbon double bond, in the presence of a homogenous catalyst, a base and hydrogen permits a conversion of the ⁇ , ⁇ -unsaturated aldehydes/ketones selectively into their respective saturated alcohols, without hydrogenation of the remaining double bond(s).
• R 1 is hydrogen or methyl
• R 2 is hydrogen or methyl
• R 3 is methyl, or ethyl
• R 4 is hydrogen or methyl
• R is a linear or branched C 3 - C-
• non-terminal carbon-to-carbon double bond is meant either a di- substituted vicinal carbon-to-carbon double bond, a tri-substituted carbon-to-carbon double bond, or a tetra-substituted carbon-to-carbon double bond.
• Non-limiting examples are compounds of formula (II) wherein R 1 is hydrogen.
• non-limiting examples are compounds of formula (II) wherein R 1 , and R 2 are hydrogen. Further, non-limiting examples are compounds of formula (II) wherein R 1 is hydrogen and R 2 is methyl.
• non-limiting examples are compounds of formula (II) wherein the ⁇ , ⁇ - unsaturated double bond is preferably in E- configuration.
• non-limiting examples are compounds of formula (II) wherein R 3 and R 4 are methyl, and the ⁇ , ⁇ -unsaturated double bond is preferably in E- configuration.
• non-limiting examples are compounds of formula (II) wherein R is a branched C 5 - Ci5 alkyl (including C 6 , C 7 , C 8 , C 9 , C 10 and Cn alkyl) comprising at least one (e.g., 2, or 3 double bonds) tri-substituted carbon-to-carbon double bond.
• non-limiting examples of compounds of formula (II) are compounds selected from 3,7-dimethylocta-2,6-dienal (R is C 5 -alkyl comprising one tri-substituted double bond); 2,4,7,1 1-tetramethyldodeca-2, 6, 10-trienal (R is Ci 0 -alkyl comprising two tri- substituted double bonds); 2,3,6,7-tetramethylocta-2,6-dienal (R is C 6 -alkyl comprising one tetra-substituted double bond); 2,4-dimethylocta-2,6-dienal (R is C 4 -alkyl comprising one vicinal di-substituted double bond); 3,7,1 1 -trimethyldodeca-2, 6,10- trienal (R is Ci 0 -alkyl comprising two tri-substituted double bonds); 3,6,8,1 1- tetramethyldodeca-2,6,10-trienal
• the process proceeds in the presence of a homogeneous ruthenium (II) catalyst.
• a homogeneous ruthenium (II) catalyst is well known to the person skilled in the art, and refers to catalysts which are present in the same phase as the substrate.
• the homogeneous ruthenium II) catalyst is a complex (A)
• X may be a halogen such as CI, Br, and I).
• the ruthenium (II) catalyst is a compound of formula (A) wherein Ar is para-methyl phenyl.
• the ruthenium (II) catalyst is RuCI 2 (PPh 3 ) 2 (ethylene- diamine), which is commercially available or may be prepared in-situ from commercially available reagents by a process as described, for example, by Takeshi Ohkuma et al. ( J. Am. Chem. Soc. 1995, 777, 10417).
• the molar ratio between substrate (compound of formula (II)) and the catalyst is at least 500 : 1 , preferably between about 1 000 : 1 and about 10 000 : 1 , or even higher.
• step (b) follows after substantially all substrate (II) has been converted to compounds of formula (III), for example, 88 % or more (including 90, 92, 95, 98, 99%) of the substrate has been converted, as measured by gas
• chromatography relative peak area.
• the conversion can be measured by techniques known in the art. For example, it can be measured by taking a sample of the reaction mixture after a given time and analyzing said mixture by GC analysis.
• NMR nuclear magnetic resonance
• TLC thin layer chromatography
• a further advantage of the process is that it can be performed almost without solvent.
• the only solvent necessary is to assist in the solubility of the base.
• Suitable solvents include alkyl alcohols, such as methanol, ethanol, iso-propanol, n-butanol.
• Suitable bases include alkali metal compounds selected from the group consisting of hydroxides (such as sodium hydroxide, lithium hydroxide, potassium hydroxide, cesium hydroxide and the like), alcoholates (such as sodium methoxide, potassium ethoxide, and the like), carboxylates (such as sodium acetate, potassium acetate and the like), carbonates and hydrogencarbonates including sodium carbonate, sodium hydrogen carbonate, lithium carbonate, potassium carbonate, cesium carbonate and the like.
• the process of the invention is carried out in the presence of a base selected from sodium hydroxide, sodium methoxide and potassium hydroxide.
• a 10 mL glass vial was charged with 1 g of 2,4,6-trimethylnona-2,6-dienal (99% purity, ElZ, 32:1 ), 1 mL cyclohexane, 2.1 mg of CI 2 Ru(PPh 3 )2(ethylenediamine) and 210 pL of NaOMe (30 wt% in MeOH).
• the vial was equipped with a stirring bar and sealed.
• the vial was flushed with N 2 (1 bar) and then three times with H 2 (1 bar) before setting the pressure of H 2 (40 bar).
• the reaction mixture was heated at 50 °C for 2 h and then 120 °C for a further 2 h.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

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• 2016
  • 2016-06-10 GB GBGB1610149.5A patent/GB201610149D0/en not_active Ceased
• 2017
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  • 2017-06-12 JP JP2018564385A patent/JP6968834B2/ja active Active
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