7-NITRO-1,2,3,4-TETRAHYDRO-ISOQUINOLINE

7-NITRO-1,2,3,4-TETRAHYDRO-ISOQUINOLINE Property

Boiling point:

319.6±42.0 °C(Predicted)

Density 

1.236±0.06 g/cm3(Predicted)

storage temp. 

2-8°C(protect from light)

pka

8.49±0.20(Predicted)

Appearance

Off-white to light yellow Solid

InChI

InChI=1S/C9H10N2O2/c12-11(13)9-2-1-7-3-4-10-6-8(7)5-9/h1-2,5,10H,3-4,6H2

InChIKey

YPRWYZSUBZXORL-UHFFFAOYSA-N

SMILES

C1C2=C(C=CC([N+]([O-])=O)=C2)CCN1

Safety

HS Code 

2933499090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H290May be corrosive to metals

H314Causes severe skin burns and eye damage

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P234Keep only in original container.

P240Ground/bond container and receiving equipment.

P241Use explosion-proof electrical/ventilating/lighting/…/equipment.

P242Use only non-sparking tools.

P243Take precautionary measures against static discharge.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P363Wash contaminated clothing before reuse.

P370+P378In case of fire: Use … for extinction.

P390Absorb spillage to prevent material damage.

P403+P235Store in a well-ventilated place. Keep cool.

P405Store locked up.

P406Store in corrosive resistant/… container with a resistant inner liner.

P501Dispose of contents/container to..…

7-NITRO-1,2,3,4-TETRAHYDRO-ISOQUINOLINE Chemical Properties,Usage,Production

Synthesis

In a mortar, 2 g of P2O5/silica gel (65% w/w) was mixed with 1,2,3,4-tetrahydroisoquinoline (10 mmol, 1.33 g) and milled for 30 s. Subsequently, 5 ml of 65% HNO3 was added slowly dropwise, and milling was continued for 20 min at room temperature until the mixture took on a deep yellow color. The progress of the reaction was monitored by TLC (n-hexane:EtOAc 70:30) to confirm the complete disappearance of 1,2,3,4-tetrahydroisoquinoline (about 30 min). After completion of the reaction, ether (50 ml) was added to the mixture and the solids were separated by filtration through a short silica gel pad and washed with ether (2 x 15 ml). The combined organic phases were washed with 10% NaHCO3 solution (20 ml) and subsequently dried with MgSO4. The solvent was removed by concentration under reduced pressure and the residue was purified by column chromatography (n-hexane:EtOAc, 2:1) to afford 7-nitro-1,2,3,4-tetrahydroisoquinoline (2b) (8 mmol, 1.4 g, 80% yield) as a yellow solid with a melting point of 121 °C. 1H NMR (δ): 8.05 (m, 2H), 7.60 (m, 1H), 3.82 (s, 2H), 3.38 (t, 2H, J = 7.4 Hz), 3.12 (t, 2H, J = 7.4 Hz), 2.83 (s, 1H).13C NMR (δ): 150.6, 145.0, 140.3, 129.6, 122.6, 121.4, 46.9, 44.1, 28.1.High-resolution mass spectra (EMS) [M+H]+ C9H10N2O2, calculated value 179.0740, measured value 179.1121.

References

[1] Bioorganic and Medicinal Chemistry, 2011, vol. 19, # 24, p. 7435 - 7440
[2] Journal of Heterocyclic Chemistry, 1985, vol. 22, p. 329 - 331
[3] Journal of Medicinal Chemistry, 2003, vol. 46, # 5, p. 831 - 837
[4] Patent: WO2004/60902, 2004, A2. Location in patent: Page/Page column 15
[5] Patent: US9138427, 2015, B2. Location in patent: Page/Page column 307