Chemical Identity and Structure

Benzyl 3-(hydroxymethyl)pyrrolidine-1-carboxylate (SKU: B638200) is a saturated five-membered nitrogen heterocycle in which the ring nitrogen is protected as a benzyloxycarbonyl (Cbz) carbamate. A hydroxymethyl group at the 3-position of the pyrrolidine ring provides a versatile primary alcohol handle for further elaboration. The molecular formula is C₁₃H₁₇NO₃, giving a molecular weight of approximately 235.28 g/mol.

The compound combines two orthogonally useful motifs: the Cbz group, removable by hydrogenolysis under mild palladium-catalyzed conditions, and the primary alcohol, amenable to oxidation, esterification, etherification, or conversion to a leaving group. The pyrrolidine core itself is a privileged scaffold in medicinal chemistry owing to its conformational rigidity, favorable lipophilicity profile, and prevalence in bioactive natural products and approved drugs.

Synthesis and Handling

Benzyl 3-(hydroxymethyl)pyrrolidine-1-carboxylate is typically prepared by Cbz protection of 3-(hydroxymethyl)pyrrolidine using benzyl chloroformate in the presence of a base such as triethylamine or sodium carbonate. The reaction is generally performed in dichloromethane or ethyl acetate at 0 °C to room temperature, affording the carbamate in good yield after aqueous workup.

The compound should be stored in a cool, dry environment away from light and moisture. As a primary alcohol bearing a base-labile carbamate, exposure to strongly acidic or strongly basic conditions should be avoided. Standard personal protective equipment — including nitrile gloves, safety glasses, and a laboratory coat — is recommended when handling this reagent. Consult the Safety Data Sheet (SDS) before use for specific hazard and first-aid information.

Applications in Medicinal Chemistry and Synthesis

The primary hydroxymethyl group in Benzyl 3-(hydroxymethyl)pyrrolidine-1-carboxylate serves as a versatile synthetic handle. It can be oxidized to an aldehyde for reductive amination or Wittig-type olefination, converted to a mesylate or tosylate for SN2 displacement reactions, or directly coupled via Mitsunobu reaction to introduce heteroatom substituents with inversion of configuration.

Following selective manipulation of the hydroxymethyl group, removal of the Cbz protecting group by catalytic hydrogenolysis (e.g., H₂, Pd/C) liberates the secondary amine, enabling further N-functionalization. This two-step deprotection-functionalization strategy makes this building block particularly attractive for the construction of diverse pyrrolidine-containing pharmacophores found in kinase inhibitors, protease inhibitors, and CNS-active agents.

The compound is also employed in fragment-based drug discovery and as a chiral scaffold when the enantiopure form is used, allowing asymmetric induction in subsequent bond-forming steps.

Comparison with Related Pyrrolidine Building Blocks

Pyrrolidine building blocks are available with a range of N-protecting groups, including Boc (tert-butoxycarbonyl), Cbz, Fmoc, and Ts (tosyl), each offering distinct deprotection conditions. The Cbz group employed in Benzyl 3-(hydroxymethyl)pyrrolidine-1-carboxylate is selectively removed by hydrogenolysis, orthogonal to the acid-labile Boc group and the base-labile Fmoc group, providing strategic flexibility in multi-step synthesis.

Compared to the corresponding Boc-protected analogue, the Cbz-protected compound offers UV detectability by HPLC due to the benzyl chromophore, simplifying reaction monitoring and purity assessment. Researchers selecting between protecting groups should consider the downstream deprotection conditions compatible with other functional groups present in the target molecule.

Quality, Availability and Ordering

Aladdin Scientific supplies Benzyl 3-(hydroxymethyl)pyrrolidine-1-carboxylate under SKU B638200. The product is characterized by standard analytical techniques including NMR spectroscopy and HPLC purity analysis prior to release. Researchers are encouraged to consult the product specification sheet for lot-specific data including purity, appearance, and storage conditions.

For bulk quantities, custom packaging, or certificate of analysis requests, contact Aladdin Scientific's technical sales team. Orders can be placed online or through authorized regional distributors. Ensure compliance with local regulations regarding the import and handling of chemical reagents.