What Is 1,4-Dioxaspiro[4,5]dec-7-en-8-boronic Acid Pinacol Ester (CAS 680596-79-6)?

1,4-Dioxaspiro[4,5]dec-7-en-8-boronic acid pinacol ester, identified by CAS 680596-79-6, is an organoboron compound used primarily as a synthetic building block in medicinal chemistry and pharmaceutical intermediate development. Its structure combines a cyclic ketal-protected spirocyclic framework with a pinacol boronate ester, allowing chemists to use it in carbon–carbon bond-forming reactions. At Maison Chemical, we treat this material as a research and process-development intermediate rather than a finished pharmaceutical ingredient.

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The compound is commonly associated with Suzuki–Miyaura coupling, where the boronate group can react with a suitable aryl or heteroaryl halide under an appropriate catalytic system. The 1,4-dioxaspiro[4,5]dec-7-ene portion can also provide a protected cyclic structural motif for subsequent synthetic transformations. Because commercial specifications may differ by supplier, buyers should confirm the current certificate of analysis, analytical data, packaging, and storage requirements before placing an order.

What Does Its Chemical Structure Contain?

This molecule contains two important structural elements. The first is a boronic acid pinacol ester, often called a Bpin group, which is a protected boronate functionality used in many synthetic coupling strategies. The second is a 1,4-dioxaspiro[4,5]dec-7-ene framework, in which a ketal-type ring system and an unsaturated six-membered ring share a spiro carbon center.

The ketal portion is useful because it can act as a protecting group for a carbonyl-related functionality during selected reaction sequences. Protection can help chemists carry out transformations at another position before exposing or converting the protected functionality at a later stage. However, the exact reaction sequence, deprotection conditions, and compatibility with other functional groups must be established experimentally for each project.

Core Functions in Organic Synthesis

Participation in Cross-Coupling Reactions

The most recognizable function of CAS 680596-79-6 is its role as a boron-containing coupling partner. In a Suzuki–Miyaura reaction, an organoboron reagent may be combined with an aryl, heteroaryl, or vinyl halide in the presence of a suitable palladium catalyst, base, solvent, and reaction temperature. The result can be the formation of a new carbon–carbon bond, although the outcome depends on substrate structure and process conditions.

This makes the compound relevant to researchers constructing substituted cyclic or spirocyclic molecules. It may be particularly useful when a project requires the introduction of a complex ring-containing fragment into a larger medicinal chemistry scaffold. We recommend screening reaction conditions on a small scale before committing material to a larger synthesis.

Use as a Protected Synthetic Intermediate

The cyclic acetal or ketal feature can help preserve a sensitive carbonyl-equivalent structure during selected steps of a multistage synthesis. After other transformations are completed, a chemist may investigate deprotection or further functionalization under suitable conditions. The appropriate method depends on the target molecule, solvent system, acid sensitivity, and presence of other reactive groups.

For this reason, the compound should be evaluated as a multifunctional intermediate rather than as a simple one-step reagent. Its value comes from the combination of a coupling handle and a protected cyclic framework. This combination can support route design, analogue preparation, and structure–activity relationship studies.

Typical Application Scenarios

CAS 680596-79-6 may be considered for pharmaceutical research programs that require rapid preparation of structurally diverse boron-containing intermediates. Medicinal chemists can use it as one component in a library or analogue synthesis strategy, provided that the intended coupling partner and downstream transformations are chemically compatible. It can also be relevant to process-development teams evaluating a scalable route to a more advanced intermediate.

Academic and industrial research laboratories may use this material during reaction screening, route scouting, and proof-of-concept synthesis. In these settings, the most important purchasing factors are usually confirmed identity, usable purity, analytical documentation, and dependable batch-to-batch supply. The material is not itself a drug product, and its use does not establish suitability for human or veterinary administration.

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Types and Material Options Buyers May Encounter

Suppliers may offer this compound in different grades or pack sizes, but the exact options are not universal. Research-grade material may be supplied for discovery chemistry, while a project-specific batch may require additional analytical review, custom quantity planning, or process-oriented documentation. Buyers should avoid assuming that a product described as “high purity” has the same impurity profile, water content, or residual solvent level across all suppliers.

Key Specifications to Confirm

The CAS number is the primary identifier for this product, but it should not be the only purchasing criterion. A commonly listed molecular weight is approximately 264.13 g/mol, while the supplier’s current technical documentation should be used for weighing calculations and formulation records. Molecular formula, purity method, water content, residual solvents, and appearance should be confirmed against the specific batch offered.

For synthesis planning, buyers should also ask whether the quoted assay is reported on an as-is basis or an adjusted basis. This distinction can affect the actual amount of active intermediate delivered to a reaction. Where a project is sensitive to trace metals, users should discuss whether additional elemental impurity information is available rather than assuming a particular result.

How to Select a Suitable Supplier

Review Documentation Before Price

A low unit price does not necessarily represent the lowest total sourcing cost. I recommend reviewing the COA, SDS, batch or lot information, analytical method, packaging description, and proposed lead time before comparing quotations. For regulated or quality-sensitive development work, documentation consistency can be as important as the nominal assay.

Match Quantity to the Development Stage

Early discovery work may require only a small quantity for reaction screening, while process development can require repeated batches with consistent specifications. Buyers should explain whether the request is for one-time research, recurring supply, or scale-up evaluation. This allows the supplier to assess available inventory, production planning, packaging, and realistic delivery timing.

Check Technical Communication

A capable chemical supplier should be able to clarify identity, specification scope, handling documentation, and commercial conditions without making unsupported claims. I also advise customers to ask how changes in batch, packaging, or manufacturing route will be communicated. Clear technical communication reduces the risk of receiving material that is chemically similar but unsuitable for the planned route.

Maison Chemical Supplier Support

At Maison Chemical, we support customers sourcing 1,4-Dioxaspiro[4,5]dec-7-en-8-boronic acid pinacol ester for pharmaceutical intermediate and research applications. We can discuss the required quantity, intended use, target specification, documentation needs, packaging preference, and delivery destination before preparing a quotation. Our role is to help buyers evaluate whether the available material matches their development stage and procurement requirements.

For a technical or commercial inquiry, please provide the CAS number 680596-79-6, estimated quantity, required delivery date, and any purity or documentation requirements. If your project involves scale-up or recurring orders, sharing the expected purchasing schedule can help us review supply planning more effectively. Final suitability should always be confirmed by the customer’s own technical, quality, and regulatory teams.

Conclusion

1,4-Dioxaspiro[4,5]dec-7-en-8-boronic acid pinacol ester is a multifunctional organoboron intermediate used mainly for synthetic chemistry. Its Bpin group provides a potential cross-coupling handle, while its spirocyclic ketal framework can support protected, multistep molecule construction. The compound is therefore most relevant to medicinal chemistry, pharmaceutical intermediate research, and route-development projects.

The next practical step is to confirm the exact identity, current assay, analytical documentation, storage guidance, quantity, and lead time for the required batch. Contact Maison Chemical with your CAS number, specification, and purchasing plan so we can review the available supply options and prepare a suitable B2B quotation.

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