141-10-6Relevant articles and documents
Water-promoted surface basicity in FeO(OH) for the synthesis of pseudoionones (PS) and their analogues
Vernekar, Dnyanesh,Sakate, Sachin S.,Rode, Chandrashekhar V.,Jagadeesan, Dinesh
, p. 80 - 89 (2019)
Use of Iron oxyhydroxide (γ-FeO(OH)) as a robust catalyst for the synthesis of important intermediates like pseudoionones and their analogues through the C-C bond formation reactions like knoevenagel and aldol condensation is explored. These motifs are the building blocks for the construction of the sesquiterpenes as well as the diterpenes such as retinoic acid, Vitamin A etc. Iron oxyhydroxide (γ-FeO(OH)) was synthesized and well characterized using XRD, FT-IR, TEM, XPS and adsorption studies to establish the catalytic activity. A thorough investigation on the nature of basic sites and the role of water as a promoter was explored based on dye adsorption, in situ methanol dissociation and CO2 adsorption studies. The catalyst also showed a wide range of substrate scope with active methylene groups involving various functional groups such as cyanides, esters and acetophenones along with its stability and reproducibility.
Chen,Le Fevre
, p. 5528,5532 (1965)
Epoxides from myrcene: New versatile tools for the synthesis of functionalized acyclic terpenoids
Fauchet,Miguel, B. Arreguy-San,Taran,Delmond
, p. 3673 - 3684 (1999)
Mono-epoxides prepared from myrcene, were used as synthetic intermediates to obtain citral, linalool, geranylacetone and pseudo-ionone.
Preparation method of pseudoionone
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Paragraph 0027-0056, (2021/03/13)
The invention provides a preparation method of a vitamin A intermediate pseudoionone. The method relates to a reaction for preparing pseudoionone by catalyzing condensation of acetone and citral by using a novel catalyst, the use amount of reaction acetone can be effectively reduced by using the novel catalyst, self-polymerization and copolymerization of citral and pseudoionone in the reaction arereduced, and the reaction selectivity and yield are improved.
PROCESS OF MAKING PSEUDOIONONE AND HYDROXY PSEUDOIONONE IN AQUEOUS MIXTURES COMPRISING CITRAL AND ACETONE, COMPRISING ADDING FIRST AND SECOND AMOUNTS OF HYDROXIDE
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Page/Page column 30-33, (2020/06/05)
Described is a process of making pseudoionone and hydroxy pseudoionone comprising the steps of (i) preparing a first aqueous mixture comprising first concentrations of acetone, citral and hydroxide, (ii) producing a second aqueous mixture by allowing to react for a reaction time the components of the first aqueous mixture and (iii) producing a third aqueous mixture by adding to the second aqueous mixture a second amount of hydroxide so that an additional amount of pseudoionone is formed in the third aqueous mixture. The invention further suggests an apparatus for making pseudoionone and hydroxy pseudoionone as well as to a respective process and use of said apparatus in making pseudoionone and hydroxy pseudoionone.
Method for catalytically synthesizing pseudoionone by using alkaline immobilized ionic liquid
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Paragraph 0023-0033, (2020/06/09)
The invention discloses a method for catalytically synthesizing pseudoionone by using alkaline immobilized ionic liquid. In the method, citral is adopted as a raw material, acetone is slowly dropwiseadded at 40-50 DEG C under the condition that the alkaline immobilized ionic liquid is used as a catalyst to react, thereby obtaining the pseudoionone; a carrier used in the alkaline immobilized ionicliquid is a PS material, the PS material is polystyrene, and the alkaline immobilized ionic liquid is one of the following components shown in the specification. The alkaline immobilized ionic liquidcatalyst disclosed by the invention is easy to separate from a reaction solution, avoids the condition of catalyst loss caused by multiple cyclic reactions, and has the advantages of high product yield, clean product and the like in the process of synthesizing pseudoionone.
