7-(Hydroxymethyl)isoquinoline: Properties, Handling & Lab Use

7-(Hydroxymethyl)isoquinoline is a hydroxymethyl-substituted isoquinoline heterocycle widely used as a versatile building block in medicinal chemistry, organic synthesis, and the preparation of pharmaceutically relevant intermediates.

Chemical Name

7-(Hydroxymethyl)isoquinoline

Core Scaffold

Isoquinoline (benzo[c]pyridine) heterocycle

Functional Group

Primary benzylic alcohol (–CH₂OH) at position 7

Key Reactivity

The hydroxymethyl group can be oxidized, halogenated, esterified, or coupled, enabling diverse downstream transformations

Typical Applications

Medicinal chemistry building block, synthesis of isoquinoline-containing drug candidates, ligand scaffold preparation

Storage Recommendation

Store in a cool, dry, well-ventilated area away from light and moisture; seal tightly after use

Aladdin SKU

M726430

Chemical Identity and Physical Properties

7-(Hydroxymethyl)isoquinoline is an isoquinoline derivative bearing a primary hydroxymethyl (–CH₂OH) substituent at the 7-position of the bicyclic aromatic ring system. The isoquinoline core is a nitrogen-containing benzo-fused heterocycle with well-established roles in natural products, alkaloids, and drug molecules.

The hydroxymethyl group at position 7 imparts amphiphilic character to the molecule, combining the lipophilic aromatic core with a hydrophilic alcohol functionality. This balance makes the compound suitable for use in polar aprotic solvents (e.g., DMSO, DMF, acetonitrile) as well as protic solvents such as methanol and ethanol. The compound is expected to be a crystalline or low-melting solid at room temperature, consistent with other hydroxymethyl-substituted isoquinolines.

Researchers should verify specific physicochemical parameters—including exact melting point, molecular weight, and purity specification—from the certificate of analysis (CoA) supplied with each lot of Aladdin product M726430.

Synthesis Relevance and Reactivity

The primary value of 7-(Hydroxymethyl)isoquinoline in laboratory synthesis lies in the versatility of its hydroxymethyl handle. This benzylic alcohol can participate in a broad range of transformations:

• Oxidation: The –CH₂OH group can be selectively oxidized to the corresponding aldehyde (isoquinoline-7-carbaldehyde) using mild oxidants such as MnO₂, Dess–Martin periodinane, or Swern conditions, providing a key electrophilic partner for further condensation or Wittig-type reactions.
• Halogenation: Treatment with SOCl₂, PBr₃, or CBr₄/PPh₃ converts the alcohol to a benzyl halide, an excellent electrophile for alkylation and cross-coupling reactions.
• Esterification and etherification: The alcohol is readily acylated or alkylated under standard conditions to install protecting groups or append pharmacophore fragments.
• Mitsunobu reaction: Enables stereochemical inversion or coupling to nucleophiles in a single step.

The isoquinoline nitrogen also participates in coordination chemistry and can be quaternized or oxidized to the N-oxide, further expanding the synthetic utility of this building block.

Safe Handling and Storage Guidelines

As with all fine chemical reagents, appropriate safe-handling practices should be observed when working with 7-(Hydroxymethyl)isoquinoline:

• Personal protective equipment (PPE): Wear nitrile gloves, safety glasses or goggles, and a laboratory coat at all times. If powder generation is anticipated, use a fitted dust mask or work in a fume hood.
• Inhalation and skin contact: Avoid breathing dust or vapours. In case of skin contact, wash thoroughly with soap and water. For eye contact, rinse with copious water and seek medical attention.
• Storage: Store in a tightly closed container in a cool (2–25 °C), dry, and well-ventilated location, protected from light and moisture. Keep away from strong oxidising agents and strong acids.
• Disposal: Dispose of waste material in accordance with local, regional, and national regulations governing heterocyclic nitrogen-containing compounds.

Always consult the Safety Data Sheet (SDS) for lot-specific hazard information before first use. The SDS for M726430 is available from Aladdin Scientific upon request or via the product page.

Laboratory Applications and Use Recommendations

7-(Hydroxymethyl)isoquinoline is employed across several research contexts:

• Medicinal chemistry: Serves as a key building block for the synthesis of isoquinoline-containing pharmaceutical candidates, particularly in kinase inhibitor, PARP inhibitor, and alkaloid-inspired drug discovery programmes.
• Fragment-based drug discovery (FBDD): The compact bicyclic scaffold combined with a reactive handle makes it an attractive fragment for library synthesis and elaboration.
• Material science and coordination chemistry: Isoquinoline nitrogen acts as a Lewis-basic donor ligand; hydroxymethyl derivatisation allows covalent tethering to supports or linkers in metal-organic framework (MOF) and catalyst research.
• Probe and tracer synthesis: The hydroxymethyl group provides a convenient attachment point for fluorescent tags, radiolabels, or affinity handles.

Recommended dissolution protocol: Dissolve in DMSO to prepare a concentrated stock solution (e.g., 10–100 mM), then dilute into aqueous buffer or reaction solvent as required. Verify solubility in the intended solvent system prior to large-scale use. Filter stock solutions through a 0.22 µm membrane filter if used in cell-based assays.

Quality, Purity, and Procurement Guidance

When procuring 7-(Hydroxymethyl)isoquinoline for research use, the following quality considerations apply:

• Purity verification: Request HPLC purity data and NMR confirmation from the supplier. Aladdin product M726430 is supplied with a certificate of analysis detailing purity and identity testing results.
• Lot-to-lot consistency: For multi-step synthetic campaigns or biological screening, reserve sufficient material from a single lot to minimise batch-to-batch variability.
• Packaging and quantity: Choose package size appropriate to the planned scale of work, balancing cost-efficiency against shelf-life considerations for opened containers.
• Regulatory compliance: Confirm that the material meets the requirements of your institution's chemical safety and environmental regulations before ordering.

For pricing, availability, and technical support for SKU M726430, contact Aladdin Scientific directly or visit the product listing on the Aladdin website.

Frequently asked questions

What solvents are recommended for dissolving 7-(Hydroxymethyl)isoquinoline?

DMSO is the most commonly recommended solvent for preparing concentrated stock solutions of hydroxymethyl-substituted isoquinolines due to its high solvating power. The compound is also expected to dissolve in polar protic solvents such as methanol and ethanol, and in polar aprotic solvents including DMF and acetonitrile. Aqueous solubility may be limited; verify in your specific buffer system before use.

How should 7-(Hydroxymethyl)isoquinoline be stored to maintain stability?

Store the compound in a tightly closed container under cool (2–25 °C), dry, and dark conditions. Moisture and light can degrade the hydroxymethyl functionality or promote oxidation of the isoquinoline ring system. Seal the container promptly after each use and return it to designated storage immediately.

What are the main chemical transformations accessible from the hydroxymethyl group of this compound?

The –CH₂OH group is highly versatile. It can be oxidised to an aldehyde (enabling condensation and Wittig reactions), converted to a benzyl halide for alkylation or cross-coupling, esterified or etherified for protection or elaboration, and engaged in Mitsunobu reactions for stereospecific bond formation. Each transformation significantly expands the structural space accessible from this single building block.

Is 7-(Hydroxymethyl)isoquinoline suitable for use in cell-based biological assays?

It can be used in cell-based assays as a building block or reference compound, provided appropriate controls are employed. Stock solutions prepared in DMSO should be filtered through a 0.22 µm sterile membrane filter before addition to cell culture media. The final DMSO concentration in assay wells should be kept below 0.1–0.5% to avoid solvent cytotoxicity. Researchers should conduct preliminary cytotoxicity profiling before biological screening.

Where can I obtain the Safety Data Sheet (SDS) for Aladdin M726430?

The SDS for 7-(Hydroxymethyl)isoquinoline (SKU M726430) is available directly from Aladdin Scientific. You can download it from the product page on the Aladdin website or contact Aladdin's customer service team to request a copy. Always review the SDS before handling any new chemical reagent.

References

1. Clayden, J.; Greeves, N.; Warren, S. Organic Chemistry, 2nd ed.; Oxford University Press: Oxford, 2012. (General reference for alcohol and heterocycle reactivity)
2. Katritzky, A. R.; Rees, C. W.; Scriven, E. F. V. (Eds.) Comprehensive Heterocyclic Chemistry II; Pergamon: Oxford, 1996. (Isoquinoline chemistry reference)
3. Aladdin Scientific. Product Certificate of Analysis, 7-(Hydroxymethyl)isoquinoline, SKU M726430. (Lot-specific physicochemical data; available from supplier)

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.