Chemical Identity and Structural Features

1-Acetyl-1,2,3,4-tetrahydroquinoline-6-carbonitrile (Aladdin SKU: A691784) is a bicyclic organic compound comprising a partially saturated quinoline ring system. The tetrahydroquinoline scaffold retains the benzene ring of quinoline while the heterocyclic ring is fully saturated at positions 1 through 4. An acetyl group is appended to the ring nitrogen at position 1, converting the secondary amine into a tertiary amide, which modulates nucleophilicity and confers conformational rigidity. A cyano (nitrile) group at the 6-position of the aromatic ring provides a strong electron-withdrawing effect, activating the ring toward nucleophilic aromatic substitution and serving as a handle for further functional-group transformations such as hydrolysis to carboxylic acid, reduction to amine, or cycloaddition to tetrazole.

The combination of the N-acetyl protecting group and the electron-deficient aromatic nitrile within a single, druglike bicyclic framework makes this compound a useful building block in the design of bioactive molecules, particularly in programs targeting CNS disorders, kinase inhibition, and other areas where the tetrahydroquinoline motif frequently appears.

Physicochemical Properties and Specification

The molecular formula of 1-Acetyl-1,2,3,4-tetrahydroquinoline-6-carbonitrile is C₁₂H₁₂N₂O, giving a molecular weight of approximately 200.24 g/mol. The compound features two nitrogen atoms: one incorporated into the lactam-like amide linkage and one as the terminal nitrile nitrogen. The aromatic ring bearing the nitrile group and the saturated piperidine-like ring together produce a planar aromatic domain fused to a flexible aliphatic ring, a geometry favorable for interactions with biological targets.

Predicted physicochemical properties include moderate lipophilicity consistent with the Lipinski rule-of-five criteria, making it suitable for further elaboration into drug candidates. The nitrile group contributes a characteristic strong absorption band in the infrared spectrum near 2220–2230 cm⁻¹, and the carbonyl of the N-acetyl group absorbs near 1660–1680 cm⁻¹. These spectral handles facilitate identity confirmation by IR and NMR spectroscopy.

Note: Specific purity, melting point, solubility, and spectral data should be confirmed against the Certificate of Analysis (CoA) issued with each lot of A691784. Contact Aladdin Scientific for current lot specifications.

Handling, Storage, and Safety Guidelines

Personal Protective Equipment (PPE): Handle 1-Acetyl-1,2,3,4-tetrahydroquinoline-6-carbonitrile wearing appropriate laboratory PPE including nitrile gloves, safety glasses or goggles, and a laboratory coat. Operations that may generate dust or aerosols should be performed in a well-ventilated fume hood.

Storage: Store the compound in a tightly sealed container in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizers, strong acids, and strong bases. The nitrile functional group is generally stable under ambient conditions; however, prolonged exposure to moisture or strongly acidic or basic environments may promote hydrolysis. Unless otherwise specified on the CoA, storage at room temperature (15–25 °C) under inert atmosphere is recommended for long-term preservation of reagent quality.

Waste Disposal: Dispose of this compound and contaminated materials in accordance with local, national, and institutional regulations governing chemical waste. Do not discharge into drains or the environment. Consult the Safety Data Sheet (SDS) provided by Aladdin Scientific for full hazard classification, first-aid measures, and regulatory information before use.

Review flag: Specific GHS hazard classifications, H-statements, and P-statements for A691784 must be confirmed from the official Aladdin Scientific SDS. Do not rely solely on this guideline for safety decisions.

Synthetic Applications and Functional Group Transformations

The two principal reactive handles in 1-Acetyl-1,2,3,4-tetrahydroquinoline-6-carbonitrile — the aromatic nitrile and the N-acetyl group — permit orthogonal downstream transformations that expand the accessible chemical space from this single building block:

• Nitrile hydrolysis: Treatment with aqueous acid or base converts the nitrile to a carboxylic acid (via the amide intermediate), providing a carboxylic acid derivative of the tetrahydroquinoline useful in amide coupling reactions.
• Nitrile reduction: Catalytic hydrogenation or hydride reduction (e.g., LiAlH₄ or DIBAL-H) affords the corresponding primary benzylic amine, expanding access to amine-functionalized analogs.
• Tetrazole formation: [3+2] cycloaddition of the nitrile with sodium azide under Lewis acid catalysis provides the 5-substituted tetrazole bioisostere, a frequently employed transformation in medicinal chemistry.
• N-Acetyl deprotection: The N-acetyl group can be cleaved under strongly acidic or basic conditions to regenerate the secondary amine of the tetrahydroquinoline, enabling N-functionalization with other acyl, sulfonyl, or alkyl groups.
• Electrophilic aromatic substitution: Despite the electron-withdrawing nitrile group deactivating the ring, directed functionalization at positions ortho or para to electron-donating substituents remains feasible under appropriate conditions.

These transformation pathways make A691784 a productive starting material or intermediate in library synthesis, fragment-based drug discovery, and the preparation of reference compounds.

Quality Assurance and Ordering Information

Aladdin Scientific supplies 1-Acetyl-1,2,3,4-tetrahydroquinoline-6-carbonitrile under SKU A691784. Each lot is accompanied by a Certificate of Analysis (CoA) documenting identity, purity, and analytical data used for quality release. Researchers are encouraged to request the CoA and the Safety Data Sheet (SDS) at the time of ordering or upon receipt of material.

Ordering: A691784 can be ordered directly through the Aladdin Scientific website or by contacting your regional Aladdin sales representative. Bulk quantities and custom packaging may be available upon request; please inquire with the sales team for pricing and lead times.

Quality specifications: Purity is assessed by HPLC or other appropriate analytical methods. Structural identity is confirmed by ¹H NMR and/or mass spectrometry. Specific lot data are available on the CoA.

Returns and inquiries: If the material does not meet the specifications stated on the CoA, contact Aladdin Scientific customer service within the stated return window. See the Aladdin Scientific returns policy for full details.