5-Fluoroisatonic anhydride
- CAS No.
- 321-69-7
- Chemical Name:
- 5-Fluoroisatonic anhydride
- Synonyms
- 6-fluoro-2H-benzo[d][1,3]oxazine-2,4(1H)-dione;5-FLUOROISATOIC ANHYDRIDE;NSC 149815;Flumazenil Impurity 15;6-FLUORO ISATIN ANHYDRIDE;5-FLUOROISATONIC ANHYDRIDE;6-fluoro-1H-3,1-benzoxazine-2,4-dione;6-Fluorobenzo[d][1,3]oxazine-2,4-dione;6-fluoro-1H-3,1-benzoxazine-2,4-quinone;6-FLUORO-2H-3,1-BENZOXAZINE-2,4(1H)-DIONE
- CBNumber:
- CB5379596
- Molecular Formula:
- C8H4FNO3
- Molecular Weight:
- 181.12
- MDL Number:
- MFCD03300719
- MOL File:
- 321-69-7.mol
- MSDS File:
- SDS
| Melting point | 259-262°C |
|---|---|
| Density | 1.502±0.06 g/cm3(Predicted) |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | soluble in DMSO |
| pka | 9.61±0.20(Predicted) |
| form | powder |
| color | Off-white to pale yellow |
| InChI | InChI=1S/C8H4FNO3/c9-4-1-2-6-5(3-4)7(11)13-8(12)10-6/h1-3H,(H,10,12) |
| InChIKey | UBKGOWGNYKVYEF-UHFFFAOYSA-N |
| SMILES | N1C2=CC=C(F)C=C2C(=O)OC1=O |
| CAS DataBase Reference | 321-69-7(CAS DataBase Reference) |
| UNSPSC Code | 12352200 |
| NACRES | NA.21 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|---|---|
| Signal word | Warning |
| Hazard statements | H315-H319 |
| Precautionary statements | P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313 |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36 |
| WGK Germany | WGK 3 |
| HazardClass | IRRITANT |
| HS Code | 2934999090 |
| Storage Class | 11 - Combustible Solids |
| Hazard Classifications | Acute Tox. 4 Oral Eye Irrit. 2 |
5-Fluoroisatonic anhydride price More Price(45)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| TRC | TRC-F592025-500MG | 5-Fluoroisatoic Anhydride | 321-69-7 | 500mg | $109 | 2026-06-03 | Buy |
| TRC | TRC-F592025-250MG | 5-Fluoroisatoic Anhydride | 321-69-7 | 250mg | $72 | 2026-06-03 | Buy |
| TRC | TRC-F592025-100MG | 5-Fluoroisatoic Anhydride | 321-69-7 | 100mg | $65 | 2026-06-03 | Buy |
| Apolloscientific | PC8701 | 5-Fluoroisatoic anhydride 95% | 321-69-7 | 1g | $21 | 2026-06-04 | Buy |
| Apolloscientific | PC8701 | 5-Fluoroisatoic anhydride 95% | 321-69-7 | 5g | $62 | 2026-06-04 | Buy |
5-Fluoroisatonic anhydride Chemical Properties, Uses, Production
Chemical Properties
Dark yellow Solid
Uses
5-Fluoroisatoic Anhydride is a versatile pharmaceutical intermediate used in the preparation of insulin secretagogues, HCV polymerase inhibitors, anxiolytic agents and other bioactive compounds.
Preparation
5-Fluoroisatonic anhydride is prepared from 5-fluoro indole (9d) by stirring in a 4:1 mixture of DMF/H2O for 16 h at room temperature.
1 H NMR (DMSO-d6): δ11.19 (s, br., 1H), 7.36 (dd, J = 8.4, 2.6 Hz, 1H), 6.87 (dt, J = 8.4, 2.2 Hz, 1H), 6.74 (dd, J = 9.3, 2.2 Hz, 1H).
Synthesis
443-69-6
321-69-7
Preparation of compound 1: Synthesis of 5-fluoroisocyanic anhydride. In a 250 mL three-necked flask assembled with a magnetic stir bar and condenser, acetic anhydride (90.0 mL), 5-fluoroindigo (20.62 g, 0.125 mol, 1.00 equiv.) and acetic acid (90 mL) were added sequentially. The reaction system was placed in a water bath and heated to 85 °C. Subsequently, chromium(VI) oxide (20.36 g, 0.204 mol, 1.63 eq.) was added in batches (~0.5 g per batch) to the red solution over 40 minutes. After addition, the reaction mixture was continued to be stirred for 15 minutes and subsequently cooled to 10 °C in an ice bath. The resulting solid product was separated by filtration and washed with 400 mL of water to remove most of the green impurities. The resulting solid was dissolved in 300 mL of a 2:1 (v/v) acetic acid/water mixture, filtered again, and dried overnight in a vacuum oven at 50 °C to afford 5-fluoroisocyanic anhydride as a bright yellow solid (14.45 g, 64% yield).
References
[1] Catalysis Science and Technology, 2015, vol. 5, # 10, p. 4830 - 4838
[2] Angewandte Chemie, 1980, vol. 92, # 3, p. 196 - 197
[3] Patent: US5863944, 1999, A
[4] Journal of the Chemical Society, 1957, p. 2916,2917
[5] Journal of medicinal chemistry, 1971, vol. 14, # 12, p. 1233 - 1235
5-Fluoroisatonic anhydride Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hangzhou Aolishen Chemical Co., Ltd. | 571-81727727 15267468089 | Frank.luo@aolisenchemical.com | China | 473 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| ChemFuture PharmaTech (Jiangsu) Ltd | 5108538618 | suger.wang@chemfuture.com | China | 832 | 65 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| Wuhan Chemwish Technology Co., Ltd | 86-027-67849912 | sales@chemwish.com | China | 35884 | 56 |
| Capot Chemical Co., Ltd | +86 (0) 571 85 58 67 18 | China | 18187 | 66 | |
| Shanghai Sinch Parmaceuticals Tech. Co. Ltd. | +86-21-54098501 | sales@sinch.com.cn | China | 11592 | 64 |
| Adamas Reagent, Ltd. | 400-6009262 15618770481 | yhx@titansci.com | China | 14098 | 59 |
| Shanghai Harvest Chemical Industrial Co., Ltd. | 15721252604 17321035817 | sales@harvest-chem.com | China | 2829 | 64 |
View Latest Price from 5-Fluoroisatonic anhydride manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-08-25 | 5-Fluoroisatonic anhydride
321-69-7
|
$1.60-6.60 | 1kg | 99% | 100kg | ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD | |
 |
2026-05-18 | 5-Fluoroisatoic anhydride
321-69-7
|
1kg | 98% | Hefei Lbao Physical & Chemical Science Co.,Ltd | |||
 |
2019-12-25 | 5-Fluoroisatonic anhydride
321-69-7
|
$1.00 | 1KG | 99% | Career Henan Chemical Co |
-
- 5-Fluoroisatonic anhydride
321-69-7
- $1.60-6.60
- 99%
- ZHENGZHOU JIUYI TIME NEW MATERIALS CO,.LTD
-
- 5-Fluoroisatoic anhydride
321-69-7
- $0.00
- 98%
- Hefei Lbao Physical & Chemical Science Co.,Ltd
-
- 5-Fluoroisatonic anhydride
321-69-7
- $1.00
- 99%
- Career Henan Chemical Co
