1665-79-8

Basic information

• Product Name: 2,2,2-TRIMETHOXY-4,5-DIMETHYL-1,3-DIOXAPHOSPHOLENE
• Synonyms: 2-dioxaphosphole,2,2-dihydro-2,2,2-trimethoxy-4,5-dimethyl-3;2,2,2-TRIMETHOXY-4,5-DIMETHYL-1,3,2-DIOXAPHOSPHOLE;2,2,2-TRIMETHOXY-4,5-DIMETHYL-1,3-DIOXAPHOSPHOLENE;4,5-Dimethyl-2,2,2-trimethoxy-1,3,2-doxaphosphole;2,2-dihydro-2,2,2-trimethoxy-4,5-dimethyl-1,3,2-dioxaphosphole;2,2,2-trimethoxy-4,5-dimethyl-1,3,2-dioxaphospholene;2,2,2-Trimethoxy-4,5-dimethyl-1,3-dioxa-2-phospha(V)cyclopentan-4-ene;2,2,2-Trimethoxy-4,5-dimethyl-2,2-dihydro-1,3,2-dioxaphosphole
• CAS NO: 1665-79-8
• Molecular Formula: C₇H₁₅O₅P
• Molecular Weight: 210.16
• EINECS: 216-779-7
• Mol File: 1665-79-8.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 64-66°C 1mm
• Flash Point: 64-66°C/1mm
• Appearance: /
• Density: g/cm³
• CAS DataBase Reference: 2,2,2-TRIMETHOXY-4,5-DIMETHYL-1,3-DIOXAPHOSPHOLENE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2,2-TRIMETHOXY-4,5-DIMETHYL-1,3-DIOXAPHOSPHOLENE(1665-79-8)
• EPA Substance Registry System: 2,2,2-TRIMETHOXY-4,5-DIMETHYL-1,3-DIOXAPHOSPHOLENE(1665-79-8)

Safety Data

• Statements: 20/21/22
• Safety Statements: 23-36/37/39
• TSCA: Yes
• Hazardous Substances Data: 1665-79-8(Hazardous Substances Data)

Usage

Uses

2,2,2-Trimethoxy-4,5-dimethyl-1,3,2-dioxaphospholene is used as an organic chemical synthesis intermediate.

InChI:InChI=1/C7H15O5P/c1-6-7(2)12-13(8-3,9-4,10-5)11-6/h1-5H3

Upstream product

• 431-03-8 dimethylglyoxal 
• 75444-07-4 C₇H₁₆O₅P⁽¹⁺⁾*FO₃S^(1-) 
• 121-45-9 phosphorous acid trimethyl ester 

Downstream Products

• 40994-88-5 5-Acetyl-5-methyl-2-phenyl-2-thiazolin-4-on 
• 52938-40-6 4,5-dimethyl-3-(toluene-4-sulfonyl)-3H-oxazole-2-thione 
• 58006-97-6 5-acetyl-2-benzylsulfanyl-5-methyl-thiazol-4-one 
• 58007-03-7 5-acetyl-5-methyl-2-phenoxy-oxazol-4-one 
• 18354-41-1 2-Phenyl-5-acetyl-5-methyl-1,3-oxazolin-4-on 
• 14181-22-7 1,2-bis-(3-acetylacetone)benzene 
• 14181-21-6 3-[2-((Z)-1-Acetyl-2-hydroxy-propenyl)-phenyl]-pentane-2,4-dione 
• 14181-22-7 (Z)-3-[2-((Z)-1-Acetyl-2-hydroxy-propenyl)-phenyl]-4-hydroxy-pent-3-en-2-one 
• 18354-42-2 2--5-acetyl-5-methyl-1,3-oxazolin-4-on 
• 58006-95-4 5-acetyl-2-diphenylamino-5-methyl-oxazol-4-one 
• 64689-05-0 (4,5-dimethyl-2-oxo-oxazol-3-yl)-phosphonic acid bis-(4-chloro-phenyl) ester 
• 64689-04-9 (4,5-dimethyl-2-oxo-oxazol-3-yl)-phosphonic acid di-p-tolyl ester 
• 64689-03-8 (4,5-dimethyl-2-oxo-oxazol-3-yl)-phosphonic acid diphenyl ester 
• 5155-86-2 phosphoric acid dimethyl ester 1-methyl-2-oxo-1-trichloromethyl-propyl ester 

Relevant articles and documents

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New constituents related to 3-methyl-2,4-nonanedione identified in green tea

The volatile constituents of two exquisite green tea varieties, Kiyosawa tea from Japan and Long Jing tea from China, were investigated in order to identify new compounds responsible for the characteristic flavor of a green tea brew. The extracts were prepared by solid-phase extraction using Oasis-HLB-cartridges. Besides the common compounds of green tea chemistry, the already described compounds 3-methyl-2,4-nonanedione (1) and 3-hydroxy-3-methyl-2,4-nonanedione (2), products of degradation of furan fatty acids, as well as three new compounds related to compound 1 were identified. These were 1-methyl-2-oxopropyl hexanoate (3), 1-methyl-2-oxoheptyl acetate (4) and 2-butyl-4,5-dimethyl-3(2H)-furanone (5). Their syntheses and spectroscopic data are reported. Compound 2 increases the sweet, creamy aroma and the characteristic mouthfeel of a green tea flavor, compounds 3 and 4 contribute to its floral, juicy notes and compound 5 exhibits an interesting sweet, buttery flavor.

Dynamic Equilibria between Pentavalent Protonated Oxyphosphoranes and Their Isomeric Tetravalent Enol Phosphonium Ions via Inter- and Intramolecular Proton Transfer

Low-temperature NMR (1H, 13C, 31P) measurements of the reaction of several pentavalent oxyphosphoranes with FSO3H in CH2Cl2 are described.Rapid equilibria between the neutral oxyphosphoranes and the enol phosphonium ions involving an intermolecular proton transfer can be obtained by implying certain structural constraints on the system, which means that less entropy has to be expended in order to obtain the rigid closed form of the protonated oxyphosphorane.Moreover, in one case evidence is presented for an intramolecular proton-exchange process which is also controlled by an intermediary pentavalent protonated oxyphosphorane.These reactions may be regarded as a model for intramolecular (biological) phosphorylation processes.