Chemical Structure and Key Properties

2,2-Bis(bromomethyl)-1,3-dioxolane (CAS 7778-67-8) consists of a five-membered cyclic acetal ring — the 1,3-dioxolane — in which the spiro carbon at position 2 bears two bromomethyl substituents. This combination of a masked carbonyl (acetal) and two primary alkyl bromide leaving groups within a single molecule gives the compound its dual synthetic utility.

The acetal moiety is stable under neutral and basic conditions but can be hydrolyzed under dilute aqueous acid to unmask the aldehyde or ketone equivalent, providing a latent carbonyl handle that survives many downstream transformations. The primary C–Br bonds are electrophilic and highly reactive toward nucleophiles such as amines, thiols, alkoxides, and stabilized carbanions under mild conditions.

Physically, the compound is typically encountered as a colorless to pale-yellow liquid or low-melting solid. It should be stored in a cool, dry environment away from moisture and reducing agents. Specific melting point, boiling point, and density values should be confirmed against the current certificate of analysis or a validated reference database.

Synthetic Applications in Organic Chemistry

The bifunctional nature of 2,2-bis(bromomethyl)-1,3-dioxolane makes it a versatile linker and scaffold in multi-step organic synthesis. Its two bromomethyl groups can react independently (stepwise) or concurrently (double alkylation) with a variety of dinucleophiles to form five- or six-membered carbocycles and heterocycles, depending on the nucleophile geometry and tether length.

Ring-forming reactions: When reacted with 1,3-dinucleophiles (e.g., malonates, 1,3-dithiols, or amino alcohols), the compound participates in intramolecular or intermolecular double alkylation to generate cyclopentane, dioxane, dithiane, or oxazolidine ring systems, among others. Such transformations are widely employed in the preparation of spirocyclic and bicyclic architectures.

Acetal deprotection strategy: Because the 1,3-dioxolane can be hydrolyzed after the alkylation steps are complete, the reagent effectively serves as a 3-carbon homologation unit terminating in an aldehyde. This allows synthetic chemists to introduce a carbonyl group at a late stage, after potentially sensitive functional groups have been installed.

Polymer and materials science: Bifunctional bromide monomers of this type are explored as cross-linking agents and chain-extenders in the preparation of functional polymers, particularly where acetal linkages are desired for stimuli-responsive or degradable materials.

Handling, Safety, and Storage Guidelines

As with all organobromine alkylating agents, 2,2-bis(bromomethyl)-1,3-dioxolane should be treated as a potential irritant and lachrymatory compound. Standard laboratory precautions apply:

• Personal Protective Equipment (PPE): Wear chemical-resistant gloves (nitrile or neoprene), safety goggles, and a lab coat. Work in a well-ventilated fume hood to minimize inhalation exposure to vapors.
• Storage: Store the compound tightly sealed in a cool (2–8 °C or as specified on the product label), dry location, away from sources of moisture, heat, and incompatible materials such as strong bases and reducing agents.
• Waste disposal: Dispose of residues and contaminated materials in accordance with local institutional and governmental regulations for halogenated organic waste.
• Spill management: Contain spills with inert absorbent material; avoid contact with skin and eyes. Consult the Safety Data Sheet (SDS) supplied with the product for comprehensive hazard information, first-aid measures, and emergency response guidance.

Researchers should always consult the current SDS prior to working with this reagent. Specific GHS hazard classifications and precautionary statements are detailed in the product documentation available from Aladdin Scientific.

Ordering and Product Information

Aladdin Scientific supplies 2,2-Bis(bromomethyl)-1,3-dioxolane under SKU B697365. Researchers and procurement teams can request certificates of analysis (CoA), safety data sheets (SDS), and current pricing through the Aladdin Scientific website or by contacting the customer service team directly.

When placing an order, please verify the required pack size, purity grade, and any special handling or shipping requirements with your account representative to ensure timely and compliant delivery. Bulk quantities and custom packaging may be available upon request.