55230-25-6

Basic information

• Product Name: 5,6-Dihydro-2-methyl-2H-pyran
• Synonyms: 5,6-Dihydro-2-methyl-2H-pyran;6-methyl-3,6-dihydro-2H-pyran
• CAS NO: 55230-25-6
• Molecular Formula: C₆H₁₀O
• Molecular Weight: 98.14
• Mol File: 55230-25-6.mol

Chemical Properties

• Boiling Point: 115.8°C at 760 mmHg
• Flash Point: 10.5°C
• Appearance: /
• Density: 0.885g/cm³
• Vapor Pressure: 22.3mmHg at 25°C
• Refractive Index: 1.436
• CAS DataBase Reference: 5,6-Dihydro-2-methyl-2H-pyran(CAS DataBase Reference)
• NIST Chemistry Reference: 5,6-Dihydro-2-methyl-2H-pyran(55230-25-6)
• EPA Substance Registry System: 5,6-Dihydro-2-methyl-2H-pyran(55230-25-6)

Safety Data

• Hazardous Substances Data: 55230-25-6(Hazardous Substances Data)

Usage

Uses

Used in Flavoring Industry:
5,6-Dihydro-2-methyl-2H-pyran is used as a flavoring agent in food and beverages for its appealing scent, enhancing the sensory experience of various products.
Used in Chemical Synthesis:
5,6-Dihydro-2-methyl-2H-pyran is also utilized in the synthesis of organic compounds, contributing to the creation of a wide range of chemical products.
Used as a Solvent:
5,6-Dihydro-2-methyl-2H-pyran serves as a solvent in various chemical reactions, facilitating processes that require a suitable medium for the reaction to occur.
Safety Considerations:
While considered relatively safe for use in food products and exhibiting low toxicity, 5,6-Dihydro-2-methyl-2H-pyran should be handled with caution. Exposure can cause irritation to the skin, eyes, and respiratory system, necessitating proper safety measures during its use in industrial applications.

InChI:InChI=1/C6H10O/c1-6-4-2-3-5-7-6/h2,4,6H,3,5H2,1H3

Upstream product

• 34884-60-1 2-hydroxy-2-methyltetrahydropyran 
• 50-00-0 formaldehyd 
• 504-60-9 penta-1,3-diene 
• 40749-83-5 4-propenyl-1,3-dioxane 
• 141-78-6 ethyl acetate 
• 5631-95-8 2,3-dichlorotetrahydro-2H-pyran 
• 6559-34-8 6-methoxy-3,6-dihydro-2H-pyran 
• 75-16-1 methylmagnesium bromide 
• 124781-37-9 (E)-1,3-dihydroxyhex-4-ene 
• 31535-05-4 cis-3-chloro-2-methyltetrahydropyran 
• 114988-53-3 1-acetoxy-3-acetoxymethoxy-4-hexene, E isomer 
• 114988-54-4 4-propenyl-1,3-dioxane, E-isomer 

Downstream Products

• 53951-42-1 (+/-)-c-2-methyltetrahydropyran-r-3,t-4-diol 
• 105554-91-4 2-dichloromethyl-2-methyl-5,6-dihydro-2H-pyran 
• 55230-27-8 2-methyl-3,4-epoxytetrahydropyran 
• 928-92-7 (E)-hex-4-en-1-ol 
• 928-96-1 (Z)-3-Hexen-1-ol 
• 928-97-2 (E)-3-hexen-1-ol 
• 95650-71-8 Butyric acid (E)-5-chloro-hex-3-enyl ester 
• 95650-68-3 1-acetoxy-5-chlorohexene-3 
• 95650-69-4 1-acetoxy-3-chlorohexene-4 
• 95650-75-2 Pentanoic acid (E)-5-chloro-hex-3-enyl ester 
• 95650-76-3 Benzoic acid (E)-5-chloro-hex-3-enyl ester 
• 95650-77-4 Benzoic acid (E)-3-chloro-hex-4-enyl ester 
• 95650-78-5 Benzoic acid (E)-5-bromo-hex-3-enyl ester 
• 95650-72-9 Butyric acid (E)-5-bromo-hex-3-enyl ester 

Relevant articles and documents

A dihydro maltol and dihydro ethyl maltol synthetic method

The invention discloses a dihydro maltol and dihydro ethyl maltol synthesis method. The method includes A, according to a formula II, allowing 2-methyl-5, 6-dihydro-2H-pyran and hydrogen peroxide to perform dihydroxylation under the effect of strong acid ion exchange resin, and obtaining a 2-methyl-3 and 4-dihydro-tetrahydropyrane intermediates of a formula III; B, according to the formula III, oxidizing the 2-methyl-3 and 4-dihydro-tetrahydropyrane intermediates through oxidation agent, and obtaining a compound of a formula IV. When R = ethyl, the compound of the formula IV is dihydro ethyl maltol; when R = methyl, the compound of the formula IV is dihydro maltol. The method adopts conventional chemical raw materials, and the reaction condition is mild.

Catalytic asymmetric [4+2]-cycloaddition of dienes with aldehydes

Despite its significant potential, a general catalytic asymmetric [4+2]-cycloaddition of simple and electronically unbiased dienes with any type of aldehyde has long been unknown. Previously developed methodologies invariably require activated, electronically engineered substrates. We now provide a general solution to this problem. We show that highly acidic and confined imidodiphosphorimidates (IDPis) are extremely effective Br?nsted acid catalysts of the hetero-Diels-Alder reaction of a wide variety of aldehydes and dienes to give enantiomerically enriched dihydropyrans. Excellent stereoselectivity is generally observed and a variety of scents and natural products can be easily accessed.

Regioselective Ni(II)-assisted alkylation of 2-methoxy-5,6- dihydro-2H-pyran: A new route to 2-n.alkyl-5,6-dihydro-2H-pyrans

In the presence of a catalytic amount of NidppeCl2, 2-methoxy- 5,6-dihydro-2H-pyran reacts with primary Grignard reagents to give the corresponding 2-n.alkyl-5,6-dihydro-2H-pyrans in satisfactory yields.