895518-38-4

Usage

Uses

Used in Pharmaceutical Industry:
(2R)-α-Tocopherol (Mixture of Diastereomers) is used as a pharmaceutical ingredient for its antioxidant properties. It helps in preventing oxidative stress and supports the immune system, making it a valuable component in various health supplements and medications.
Used in Food and Beverage Industry:
In the food and beverage industry, (2R)-α-Tocopherol (Mixture of Diastereomers) is used as a natural antioxidant to extend the shelf life of products and maintain their quality. It is commonly added to oils, fats, and processed foods to prevent rancidity and preserve freshness.
Used in Cosmetics and Personal Care Industry:
(2R)-α-Tocopherol (Mixture of Diastereomers) is used as an active ingredient in cosmetics and personal care products due to its antioxidant and skin-protective properties. It helps to nourish and moisturize the skin, reduce the appearance of fine lines and wrinkles, and protect against environmental stressors.
Used in Animal Nutrition:
In animal nutrition, (2R)-α-Tocopherol (Mixture of Diastereomers) is used as a dietary supplement to support the health and well-being of animals. It helps to maintain proper immune function, reproductive health, and overall vitality in livestock and pets.

Upstream product

• 69400-39-1 (+) (S)-6-benzyloxy-2,5,7,8-tetramethyl-chroman-2-carbaldhyde 
• 58846-73-4 (S)-6-benzyloxy-2,5,7,8-tetramethylchroman-2-acetaldehyde 
• 1192216-90-2 (2R)-6-(tert-butyldimethylsilyloxy)-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)chroman 
• 13786-84-0 3,7,11-trimethyldodecanal 
• 6750-34-1 3,7,11-trimethyldodecyl alcohol 
• 106-28-5 Farnesol 
• 174681-06-2 (E)-5-(5-(benzyloxy)-2-hydroxy-3,4,6-trimethylphenyl)-3-methylpent-2-en-1-ol 
• 59-02-9 vitamin E 
• 79397-72-1 (-)-(S)-6-benzyloxy-2,5,7,8-tetramethylchroman-2-carboxylic acid methyl ester 
• 79397-68-5 rac-2,6,10-trimethylundecen-1-en-3-ol 

Downstream Products

• 1406-70-8 (2R,4'RS,8'RS)-α-tocopheryl acetate 

Relevant academic research and scientific papers

Enantioselective Cleavage of Cyclobutanols Through Ir-Catalyzed C?C Bond Activation: Mechanistic and Synthetic Aspects

The Ir-catalyzed conversion of prochiral tert-cyclobutanols to β-methyl-substituted ketones proceeds under comparably mild conditions in toluene (45–110 °C) and is particularly suited for the enantioselective desymmetrization of β-oxy-substituted substrates to give products with a quaternary chirality center with up to 95 % ee using DTBM-SegPhos as a chiral ligand. Deuteration experiments and kinetic isotope effect measurements revealed major mechanistic differences to related RhI-catalyzed transformations. Supported by DFT calculations we propose the initial formation of an IrIII hydride intermediate, which then undergoes a β-C elimination (C?C bond activation) prior to reductive C?H elimination. The computational model also allows the prediction of the stereochemical outcome. The Ir-catalyzed cyclobutanol cleavage is broadly applicable but fails for substrates bearing strongly coordinating groups. The method is of particular value for the stereo-controlled synthesis of substituted chromanes related to the tocopherols and other natural products.

Gold-catalyzed asymmetric allylic substitution of free alcohols: An enantioselective approach to chiral chromans with quaternary stereocenters for the synthesis of Vitamin E and analogues

The enantioselective synthesis of α- and γ-tocopherol (the most biologically active members of vitamin E family) and analogues has been accomplished employing a new enantioselective gold catalyzed intramolecular allylic alkylation reaction followed by an olefin cross-metathesis as key steps. The methodology proved to be applicable to different olefins highlighting its potential for the synthesis of diverse libraries. The enantioselective synthesis of α- and γ-tocopherol (the most biologically active members of vitamin E family) and analogues has been accomplished employing an enantioselective gold-catalyzed intramolecular allylic alkylation reaction followed by an olefin cross-metathesis as key steps (see scheme).

Process of separating chiral isomers of chroman compounds and their derivatives and precursors

The present invention relates to a process of separating chiral isomers of chroman compounds, particularly tocopherols and tocotrienols as well as the esters and intermediates thereof. It has been found that this process allows a separation of the desired isomer with a higher yield and enables the use of the non-desired isomers in a very efficient way. Said process is particularly useful when implemented in an industrial process. Furthermore, it has been found that this process allows using isomer mixtures as they result from traditional industrial synthesis.

Stereocontrolled generation of the (2R) chroman core of vitamin E: Total synthesis of (2R,4'RS,8'RS)-α-tocopherol

(2R,4'RS,8'RS)-α-Tocopherol (1) was prepared using, as the two key steps, a novel diastereoselective TiCl4-promoted (S)-sulfoxide-directed allylation of ketal 2 with allyl trimethyl silane 3 to efficiently generate the challenging (2R) stereocenter of the

Reagent directing group controlled organic synthesis: Total synthesis of (R,R,R,)-α-tocopherol

(Chemical Equation Presented) The direct approach: The efficient use of substrate control has served as the basis for the enantioselective total synthesis of (R,R,R)-α-tocopherol. A single reagent directing group (ortho-diphenylphosphanyl benzoate, o-DPPB) served to control the stereoselectivity of a rhodium-catalyzed hydroformylation reaction and the directed allylic substitution as the fragment-coupling step (see picture).

An easy two-step reduction of salicylic acids and alcohols to 2-methylphenols

Salicylic acids and alcohols can be reduced to 2-methylphenols by a simple two steps procedure. Reaction conditions were optimized carrying out a study on the solvent effect and the amount of the reducing agent. The improved procedure resulted particularly useful in the synthesis of deuterated building blocks of biological interest. Georg Thieme Verlag Stuttgart.