1-Chloro-3-methoxypropane: Properties, Handling & Lab Use Guide

1-Chloro-3-methoxypropane is a bifunctional alkyl chloride reagent bearing both a chloro leaving group and a methoxy ether moiety, making it a versatile electrophilic building block for organic synthesis and medicinal chemistry research.

Chemical Name

1-Chloro-3-methoxypropane

Synonyms

3-Methoxypropyl chloride; 3-Chloropropyl methyl ether

Molecular Formula

C4H9ClO

Molecular Weight

108.57 g/mol

CAS Number

6962-00-1

Functional Groups

Primary alkyl chloride; methyl ether

Aladdin SKU

C108061

Physicochemical Properties

1-Chloro-3-methoxypropane (CAS 6962-00-1, MW 108.57 g/mol, molecular formula C₄H₉ClO) is a colorless to pale-yellow mobile liquid at room temperature. It contains a primary alkyl chloride at the C-1 position and a methyl ether at the C-3 position, giving it moderate polarity relative to simple alkyl chlorides. The compound is miscible with common organic solvents including dichloromethane, tetrahydrofuran, diethyl ether, and acetone, but has limited miscibility with water due to the dominant hydrophobic character of the propyl chain.

The C–Cl bond at the primary carbon is reactive toward nucleophilic substitution (S_N2) under mild conditions, while the ether oxygen is comparatively resistant to nucleophilic attack under standard reaction temperatures, making 1-chloro-3-methoxypropane a chemoselective alkylating agent. Storage under inert atmosphere at 2–8 °C in a tightly sealed container is recommended to minimize hydrolysis and slow decomposition.

Synthetic Applications

As a primary alkyl chloride, 1-chloro-3-methoxypropane serves as a versatile electrophile in a range of synthetic transformations. It is commonly employed in the alkylation of amines, thiols, malonate esters, and stabilized carbanions to introduce the 3-methoxypropyl chain, a motif encountered in pharmaceutical intermediates and specialty materials.

The compound is particularly useful in protecting-group strategies: the methoxypropyl unit can be attached to heteroatom nucleophiles (e.g., alcohols or amines), and the resulting ether or amine may subsequently be cleaved under acidic or reductive conditions where warranted by the synthetic context. In palladium-catalyzed cross-coupling contexts, 1-chloro-3-methoxypropane may act as an alkyl electrophile when activated under appropriate catalyst systems. It also finds use as a tethering agent for solid-phase synthesis linkers and surface functionalization of silica or polymer supports bearing nucleophilic sites.

Safe Handling, Storage, and Disposal

Personal Protective Equipment: Handle 1-chloro-3-methoxypropane in a well-ventilated fume hood. Wear chemical-resistant gloves (nitrile or neoprene), safety goggles, and a laboratory coat at all times. Avoid inhalation of vapors; prolonged skin contact may cause irritation.

Storage: Store in a cool, dry location at 2–8 °C under an inert atmosphere (nitrogen or argon). Keep the container tightly sealed to prevent moisture ingress and vapor release. Segregate from strong oxidizers, strong bases, and reactive metals.

Spill Response: In the event of a spill, ventilate the area immediately, avoid ignition sources, and absorb the liquid with an inert material (e.g., vermiculite or dry sand). Collect the waste in a sealed, labeled container for disposal according to local hazardous chemical waste regulations.

Disposal: Dispose of 1-chloro-3-methoxypropane and contaminated materials in accordance with institutional, local, and national environmental regulations governing halogenated organic solvent waste.

Note: Consult the Safety Data Sheet (SDS) for C108061 for complete hazard classification and first-aid measures before use.

Quality, Purity, and Specification Considerations

For sensitive synthetic applications, reagent purity is critical. 1-Chloro-3-methoxypropane from Aladdin Scientific (SKU C108061) is supplied for research use. Researchers should confirm lot-specific purity by reviewing the Certificate of Analysis (CoA) available at the time of ordering. Key quality attributes to assess include:

• Purity (GC): Confirm purity by gas chromatography to minimize the impact of residual starting materials or hydrolysis by-products (e.g., 3-methoxypropan-1-ol) on reaction outcomes.
• Water Content: Moisture-sensitive reactions may require the reagent to be dried over molecular sieves (3Å or 4Å) prior to use.
• Color and Appearance: The reagent should appear colorless to very pale yellow; significant discoloration may indicate decomposition or contamination.
• Halide Content: For applications sensitive to free chloride ion, titration or ion chromatography can be used to verify ionic impurity levels.

Contact Aladdin Scientific technical support for custom purity grades or bulk quantity inquiries.

Frequently asked questions

What nucleophiles react efficiently with 1-Chloro-3-methoxypropane under mild conditions?

As a primary alkyl chloride, 1-chloro-3-methoxypropane undergoes efficient Sₙ2 reactions with soft, polarizable nucleophiles including thiolates, amines, sodium azide, malonate anions, and alkoxide ions under mild heating (40–80 °C) in polar aprotic solvents such as DMF, DMSO, or acetonitrile. More reactive nucleophiles (e.g., thiolates) may react at or near room temperature.

How should I store 1-Chloro-3-methoxypropane to maximize shelf life?

Store 1-chloro-3-methoxypropane at 2–8 °C in a tightly sealed amber glass container under an inert gas (nitrogen or argon). Minimize exposure to light, moisture, and air to reduce the risk of hydrolysis and slow decomposition. Always check the Certificate of Analysis upon receipt and re-test purity by GC if the compound has been stored for an extended period.

Is 1-Chloro-3-methoxypropane compatible with organometallic reagents such as Grignard reagents?

1-Chloro-3-methoxypropane can itself be used to generate the corresponding Grignard reagent (3-methoxypropylmagnesium chloride) by reaction with magnesium metal in anhydrous THF or diethyl ether under standard conditions, provided water and oxygen are rigorously excluded. Conversely, the compound acts as an electrophile toward other pre-formed Grignard or organolithium reagents; compatibility should be evaluated on a case-by-case basis considering competing reactions with the ether oxygen under strongly Lewis-acidic or superbasic conditions.

What are common signs of decomposition or degradation in 1-Chloro-3-methoxypropane?

Signs of degradation include noticeable yellowing or browning of the liquid, development of a sharp acidic odor (indicating HCl evolution from hydrolysis), increased viscosity, or the presence of a separate aqueous layer. If any of these signs are observed, re-assay the purity by GC before use in critical applications and discard the material if purity does not meet specifications.

References

1. March, J.; Smith, M. B. March's Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 7th ed.; Wiley: Hoboken, NJ, 2013. (General Sₙ2 reactivity of primary alkyl halides.)
2. Clayden, J.; Greeves, N.; Warren, S. Organic Chemistry, 2nd ed.; Oxford University Press: Oxford, 2012. (Nucleophilic substitution and alkyl halide reactivity.)
3. Aladdin Scientific. Certificate of Analysis for 1-Chloro-3-methoxypropane, SKU C108061. (Lot-specific purity and physicochemical data; consult current CoA at time of purchase.)

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