ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate
- Product Name
- ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate
- CAS No.
- 158154-63-3
- Chemical Name
- ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate
- Synonyms
- Ethyl 5-(tert-butyl);ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate;5-(tert-Butyl)-1,2,4-oxadiazole-3-carboxylic acid ethyl ester;2-cyclohexyl-3-(9H-fluoren-18-ylmethoxycarbonylamino)propanoic acid;1,2,4-Oxadiazole-3-carboxylic acid, 5-(1,1-dimethylethyl)-, ethyl ester
- CBNumber
- CB91561088
- Molecular Formula
- C9H14N2O3
- Formula Weight
- 198.22
- MOL File
- 158154-63-3.mol
ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate Property
- Boiling point:
- 273℃
- Density
- 1.102
- Flash point:
- 119℃
- storage temp.
- Sealed in dry,Room Temperature
- pka
- -3.97±0.10(Predicted)
- Appearance
- Colorless to light yellow Liquid
Safety
- HS Code
- 2934999090
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P233Keep container tightly closed.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P312Call a POISON CENTER or doctor/physician if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P332+P313IF SKIN irritation occurs: Get medical advice/attention.
P337+P313IF eye irritation persists: Get medical advice/attention.
P340Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P362Take off contaminated clothing and wash before reuse.
P403+P233Store in a well-ventilated place. Keep container tightly closed.
P405Store locked up.
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- E956235
- Product name
- Ethyl5-(tert-butyl)-1,2,4-oxadiazole-3-carboxylate
- Packaging
- 10mg
- Price
- $45
- Updated
- 2021/12/16
- Product number
- 7937AA
- Product name
- Ethyl5-tert-butyl-1,2,4-oxadiazole-3-carboxylate
- Packaging
- 100mg
- Price
- $165
- Updated
- 2021/12/16
- Product number
- 4H58-1-YR
- Product name
- 5-tert-Butyl-[1,2,4]oxadiazole-3-carboxylic acid ethyl ester
- Packaging
- 500mg
- Price
- $221
- Updated
- 2021/12/16
- Product number
- 129498
- Product name
- 5-tert-Butyl-[1,2,4]oxadiazole-3-carboxylicacidethylester
- Purity
- 95%+
- Packaging
- 500mg
- Price
- $342
- Updated
- 2021/12/16
- Product number
- 4H58-1-YR
- Product name
- 5-tert-Butyl-[1,2,4]oxadiazole-3-carboxylic acid ethyl ester
- Packaging
- 1g
- Price
- $349
- Updated
- 2021/12/16
ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate Chemical Properties,Usage,Production
Synthesis
10489-74-4
75-98-9
158154-63-3
3.10.2 Synthesis of ethyl 5-(tert-butyl)-1,2,4-oxadiazole-3-carboxylate (949-4) Under stirring conditions, ethyl 2-hydroxyamino-2-iminoacetate (5.0 g, 37.8 mmol) was dissolved in DMF (60 mL), and pivalic acid (3.86 g, 37.8 mmol), 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI, 7.97 g, 41.58 mmol), 1-hydroxybenzo triazole (HOBt, 6.12 g, 45.3 mmol) and N,N-diisopropylethylamine (DIPEA, 19.7 mL, 113.4 mmol). The reaction mixture was stirred at room temperature overnight and then heated to 100 °C for 1 hour. After cooling to room temperature, the extract was partitioned with ethyl acetate (EA) and water. The organic layer was separated and the aqueous layer was back-extracted with ethyl acetate (3×). The organic layers were combined, washed with saturated brine and dried over anhydrous sodium sulfate. After concentration under reduced pressure, the residue was purified by fast column chromatography (silica gel, petroleum ether/ethyl acetate = 10:90 to 90:10) to afford the target product, ethyl 5-(tert-butyl)-1,2,4-oxadiazole-3-carboxylate (949-4) (1.8 g, 24%), as a yellow solid.LC-MS: ESI m/z (M+1) = 199.36.
References
[1] Patent: US2018/194762, 2018, A1. Location in patent: Paragraph 0810
ethyl 5-tert-butyl-1,2,4-oxadiazole-3-carboxylate Preparation Products And Raw materials
Raw materials
Preparation Products
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