504-77-8

Basic information

• Product Name: 4,5-dihydrooxazole
• Synonyms: 4,5-dihydrooxazole;4,5-dihydro-1,3-oxazole;4,5-dihydro-1,3-oxazol
• CAS NO: 504-77-8
• Molecular Formula: C₃H₅NO
• Molecular Weight: 71.0779
• EINECS: 208-000-4
• Product Categories: Heterocycles
• Mol File: 504-77-8.mol
• Article Data: 63

Chemical Properties

• Melting Point: 168-1720C
• Boiling Point: 74℃
• Flash Point: 5℃
• Appearance: /
• Density: 1.13
• PKA: 4.75±0.50(Predicted)
• CAS DataBase Reference: 4,5-dihydrooxazole(CAS DataBase Reference)
• NIST Chemistry Reference: 4,5-dihydrooxazole(504-77-8)
• EPA Substance Registry System: 4,5-dihydrooxazole(504-77-8)

Safety Data

• Hazardous Substances Data: 504-77-8(Hazardous Substances Data)

Usage

Description

4,5-dihydrooxazole is an organic compound characterized by its white crystalline solid appearance. It is a heterocyclic compound with a five-membered ring containing four carbon atoms and one nitrogen atom. The structure of 4,5-dihydrooxazole contributes to its unique chemical properties and potential applications in various industries.

Uses

Used in Pharmaceutical Industry:
4,5-dihydrooxazole is used as a key intermediate in the synthesis of various pharmaceutical compounds. Its unique structure allows for the development of new drugs with potential therapeutic applications.
Used in Agrochemical Industry:
4,5-dihydrooxazole is used as a starting material for the preparation of 2,4-Diaryloxazolines, which are known for their insecticidal and acaricidal properties. These compounds are utilized in the development of effective insecticides and acaricides to protect crops and control pests in the agricultural sector.
Used in Chemical Synthesis:
Due to its reactive nature, 4,5-dihydrooxazole can be employed as a building block in the synthesis of various organic compounds. Its versatility makes it a valuable component in the creation of new molecules with potential applications in different industries, such as materials science, pharmaceuticals, and agrochemicals.

InChI:InChI=1/C3H5NO/c1-2-5-3-4-1/h3H,1-2H2

Upstream product

• 119072-55-8 tert-butylisonitrile 
• 141-43-5 ethanolamine 
• 693-06-1 (2-hydroxyethyl)-formamide 
• 24589-68-2 N-(2-chloroethyl)formamide 

Downstream Products

• 492-38-6 2-phenylacrylic acid 
• 130775-92-7 [1S-[1α,2α(Z),3α,4α]]-6-[3-[4-[[[2-(4-Chlorophenyl)ethyl]amino]carbonyl]-2-oxazolyl]-7-oxabicyclo[2.2.1]hept-2-yl]-4-hexenoic acid, methyl ester 
• 130776-11-3 [1S-[1α,2α(Z),3α,4α]]-7-[3-[4-[[(4-Cyclohexylbutyl)amino]carbonyl]-2-oxazolyl]-7-oxabicyclo[2.2.1]hept-2-yl]-5-heptenoic acid, methyl ester 
• 288-42-6 oxazol 
• 67305-72-0 1-(2-mercaptoethylamino)-1-propanone 
• 288089-62-3 (4S)-4,5-dihydro-4-(1,1-dimethylethyl)-2-phenyloxazole 
• 130775-90-5 [1S-[1α,2α(Z),3a,4a]]-6-[3-[4-[[(2-Cyclohexylethyl)amino]carbonyl]-2-oxazolyl]-7-oxabicyclo[2.2.1]hept-2-yl]-4-hexenoic acid, methyl ester 
• 30093-97-1 3,4,4-trimethyl-Δ²-oxazolinium iodide 
• 103863-14-5 4-phenyl-3-pyridinecarboxylic acid 

Relevant articles and documents

The dissociation chemistry of low-energy N-formylethanolamine ions: Hydrogen-bridged radical cations as key intermediates

Tandem mass spectrometry experiments show that N-formylethanolamine molecular ions HOCH2CH2NHC(H)O+ (FE1) lose C2H3O, CH2O and H2O to yield m/z 46 ions HC(OH)NH2+, m/z 59 ions CH2N(H)CHOH +, and m/z 71 N-vinylformamide ions CH2C(H)N(H)CHO +. A detailed mechanistic study using the CBS-QB3 model chemistry reveals that the readily generated 1,5-H shift isomer HOCHCH2N(H)C(H) OH+ (FE2) and hydrogen-bridged radical cations (HBRCs) act as key intermediates in a 'McLafferty + 1′ type rearrangement that yields the m/z 46 ions. The co-generated C2H3O neutrals are predicted to be vinyloxy radicals CH2CHO in admixture with CH3CO generated by quid-pro-quo (QPQ) catalysis. A competing C-C bond cleavage in FE1 leads to HBRC [CH2N(H)C(H)O-...H...OCH2] +, which serves as the direct precursor for CH2O loss. In addition, ion FE2 also communicates with a myriad of ion-molecule complexes of vinyl alcohol and formimidic acid whose components may recombine to form distonic ion FE3, HOCH(CH2)N(H)C(H)OH+, which loses H 2O after undergoing a 1,5-H shift. Further support for these proposals comes from experiments with D- and 18O-labelled isotopologues. Previously reported proposals for the H2O and CO losses from protonated N-formylethanolamine are briefly re-examined.

ALPHA-HELIX MIMETIC WITH FUNCTIONALIZED PYRIDAZINE

The synthesis of new α-helix scaffolds mimicking i, i+3 or i+4, i+7 residues, was accomplished. The common pyridazine heterocycle originates from the easily available dimethyl pyridazine-3,6-dicarboxylate building block. These scaffolds may be thought of as synthetic counterparts of amphiphilic α-helices having a hydrophilic face along one side and a hydrophobic face along the other side of the helix.

METHOD OF MAKING UP WITH A LIGHT-SENSITIVE MAKEUP, AND A LIGHT-SENSITIVE MAKEUP COMPOSITION

The present invention provides a method of making up human keratinous material with a light-sensitive makeup, in which: i. a layer of a thermally stable photochromic composition comprising a photochromic agent capable of being developed by UV radiation and an optical agent that screens UV radiation is applied to the keratinous material; and ii. the layer of composition is exposed in non uniform manner to UV radiation to excite the photochromic agent and create a light-sensitive makeup look, the screening power F of the composition as regards solar UV radiation (280 nm to 400 nm) being 2 or more.