| Identification | More | [Name]
7-Ethylindole | [CAS]
22867-74-9 | [Synonyms]
7-ETHYLINDOLE
TIMTEC-BB SBB007573
7-ETHYL-INDOL
7-ETHYLINDOLE(ETODOLAC INTERMEDIATE)
7-Ethylindole,98+%
7-ETHYLCAMPTOTHECIN | [EINECS(EC#)]
682-584-2 | [Molecular Formula]
C10H11N | [MDL Number]
MFCD00143514 | [Molecular Weight]
145.2 | [MOL File]
22867-74-9.mol |
| Chemical Properties | Back Directory | [Appearance]
clear yellow to red-brown liquid | [Melting point ]
82.5°C (estimate) | [Boiling point ]
230 °C | [density ]
1.058 g/mL at 20 °C(lit.)
| [refractive index ]
n20/D 1.603
| [Fp ]
230°C | [storage temp. ]
Sealed in dry,2-8°C | [solubility ]
Chloroform (Slightly), Methanol (Slightly) | [form ]
Oil | [pka]
17.30±0.30(Predicted) | [color ]
Clear Colorless to Light Brown | [Specific Gravity]
1.058 | [Water Solubility ]
INSOLUBLE | [BRN ]
1238356 | [InChI]
InChI=1S/C10H11N/c1-2-8-4-3-5-9-6-7-11-10(8)9/h3-7,11H,2H2,1H3 | [InChIKey]
PIIZLMYXLGYWTN-UHFFFAOYSA-N | [SMILES]
N1C2=C(C=CC=C2CC)C=C1 | [CAS DataBase Reference]
22867-74-9(CAS DataBase Reference) |
| Safety Data | Back Directory | [Safety Statements ]
S23:Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer) .
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
3
| [HS Code ]
29339980 |
| Hazard Information | Back Directory | [Chemical Properties]
clear yellow to red-brown liquid | [Uses]
7-Ethylindole is a useful intermediate for etodolac derivative synthesis. It is also used in preparation of benzoheterocycles using butoxy-dihydrofurans as [4+2] benzannulation reagents. | [Application]
7-Ethylindole serves as a crucial intermediate for producing pharmaceutical agents. It represents a new addition to the liquid organic hydrogen carrier (LOHC) family, known as 7-ethylindole (7-EID). With a low melting point of -14 °C and a substantial hydrogen content of 5.23 wt%, it stands out among its counterparts. The hydrogenation process of this compound utilized a commercial 5 wt% Ru/Al2O3 catalyst under H2 pressure ranging from 5–8 MPa and temperatures ranging from 120–160 °C. It was observed that the hydrogenation rate correlates positively with the reaction temperature. However, the effect of H2 pressure on the rate was minimal if the pressure exceeded 6 MPa. Complete dehydrogenation of 8H-7-EID to 7-EID was achieved within 270 minutes at 190 °C. The liberated H2 exhibited high purity, meeting the requirements of proton exchange membrane fuel cells[1].
| [References]
[1] Zhiwen Chen. “7-ethylindole: A new efficient liquid organic hydrogen carrier with fast kinetics.” International Journal of Hydrogen Energy 43 28 (2018): Pages 12688-12696.
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