|
|
| | 2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one Basic information |
| Product Name: | 2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one | | Synonyms: | LABOTEST-BB LT00451615;TIMTEC-BB SBB006815;2H-PYRIDO(3,2-B)-1,4-OXAZIN-3(4H)-ONE 95 %;3,4-Dihydro-2H-pyrido[3,2-b]-1,4-oxazine-3-one;2,3-dihydro-3-oxo-4H-pyrido[3,2-b]-1,4-oxazine;4H-pyrido[2,3-e][1,4]oxazin-3-one;2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one ISO 9001：2015 REACH;2H,4H-pyrido[3,2-b][1,4]oxazin-3-one | | CAS: | 20348-09-8 | | MF: | C7H6N2O2 | | MW: | 150.13 | | EINECS: | 243-751-1 | | Product Categories: | C7 and C8;Heterocyclic Building Blocks;Pyridines, Pyrimidines, Purines and Pteredines;Heterocyclic Compounds;Pyridines | | Mol File: | 20348-09-8.mol | ![2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one Structure](CAS/GIF/20348-09-8.gif) |
| | 2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one Chemical Properties |
| Melting point | 204-206 °C(lit.) | | Boiling point | 384.2±37.0 °C(Predicted) | | density | 1.327±0.06 g/cm3(Predicted) | | storage temp. | Sealed in dry,Room Temperature | | pka | 11.06±0.20(Predicted) | | form | liquid | | Appearance | Off-white to light brown Solid | | BRN | 1074010 | | InChI | 1S/C7H6N2O2/c10-6-4-11-5-2-1-3-8-7(5)9-6/h1-3H,4H2,(H,8,9,10) | | InChIKey | ANHQLUBMNSSPBV-UHFFFAOYSA-N | | SMILES | O=C1COc2cccnc2N1 | | CAS DataBase Reference | 20348-09-8(CAS DataBase Reference) |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-37/39 | | WGK Germany | 3 | | HazardClass | IRRITANT | | HS Code | 2933998090 | | Storage Class | 11 - Combustible Solids | | Hazard Classifications | Eye Irrit. 2
Skin Irrit. 2
STOT SE 3 |
| | 2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one Usage And Synthesis |
| Uses | 2H-Pyrido[3,2-b]-1,4-oxazin-3(4H)-one was used in the synthesis of quinazolinbenzoxazine derivatives. | | Synthesis | A reaction mixture was prepared by mixing a solution of 2-amino-3-hydroxypyridine (45 mmol) and sodium bicarbonate (51 mmol) in water (30 mL) with 2-butanone (30 mL). A solution of 2-butanone (10 mL) with chloroacetyl chloride (51 mmol) was slowly added dropwise under ice-bath cooling conditions, and the rate of dropwise acceleration was controlled to keep the reaction temperature from exceeding 10°C. The reaction was carried out at room temperature. After dropwise addition, stirring was continued at room temperature for 30 min, and then the reaction was warmed up to 75°C for 1 hr. Upon completion of the reaction, the reaction solution was concentrated and purified by recrystallization (methanol/water=1:1) to afford 4.3 g of the target product 2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one. | | References | [1] Bioorganic and Medicinal Chemistry, 1998, vol. 6, # 2, p. 133 - 142
[2] Helvetica Chimica Acta, 1976, vol. 59, p. 1593 - 1612
[3] Patent: CN103130792, 2016, B. Location in patent: Paragraph 0605-0607 |
| | 2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one Preparation Products And Raw materials |
|