4-(3-Hydroxypropyl)morpholine is a heterocyclic compound built around a morpholine ring containing both a nitrogen and an oxygen atom, with the ring nitrogen carrying a propyl chain that terminates in a hydroxyl group. This structure places it among the more practical heterocyclic building blocks available to synthetic chemists, because it offers two distinct points of reactivity within a single molecule: a tertiary amine on the ring and a primary alcohol at the end of the chain. In synthesis laboratories, the material is frequently used to install a morpholinopropyl side chain onto a target molecule, a motif encountered often in compounds arising from medicinal chemistry design work because of its ability to improve aqueous solubility.
The characteristic that makes this reagent a preferred choice is the balance of its properties. The morpholine ring is weakly basic and relatively stable across a wide range of reaction conditions, allowing it to survive several synthetic steps without requiring a protecting group. Meanwhile, the primary alcohol at the end of the chain is readily activated into a leaving group, esterified, etherified, or carried into coupling reactions, which makes the compound straightforward to join to other molecular fragments. The presence of both oxygen and nitrogen atoms gives the compound good solubility in water and in polar organic solvents, simplifying workup and purification.
In Indonesian laboratories, this building block is typically found in university research groups, pharmaceutical research and development units, and contract synthesis facilities engaged in preparing intermediates and analogue series. It is normally handled as part of bench-scale multi-step synthesis campaigns, where its role is to introduce a solubilising side chain late in a route. Institutions supporting graduate research in organic and medicinal chemistry keep it available as a standard shelf reagent for scaffold elaboration work.
- Medicinal chemistry analogue synthesis: the morpholinopropyl motif is installed onto lead scaffolds to improve aqueous solubility, and the primary alcohol provides a clean attachment point without disturbing the basic ring nitrogen.
- Side-chain alkylation of target molecules: after conversion of the terminal hydroxyl into a leaving group, the resulting electrophile transfers the entire morpholinopropyl unit onto phenols, amines, or other nucleophilic positions in one step.
- Etherification and esterification chemistry: the primary alcohol reacts readily under standard etherification and acylation conditions, letting chemists tether the morpholine fragment to carboxylic acids or aromatic hydroxyl groups.
- Coupling reaction substrate preparation: the compound serves as an alcohol partner in coupling chemistry, where the stable weakly basic morpholine ring tolerates the reaction environment without needing protection or later deprotection.
- Multi-step intermediate preparation: its stability across successive synthetic operations allows the fragment to be carried forward from early stages, reducing the number of protecting group manipulations required in a route.
| Brand | TCI |
|---|---|
| CAS number | 4441-30-9 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Heterocyclic Building Blocks |
| Pack sizes | available in standard TCI research-scale catalogue pack sizes; confirm the specific size when ordering |
| Physical form | — |
| Storage | keep in a tightly closed container in a cool, dry, well-ventilated place |
- Catalogue code: H1355
Store the compound in a tightly closed original container in a cool, dry, and well-ventilated area, away from heat sources, direct sunlight, and incompatible materials such as strong oxidising agents and strong acids. Containers should be kept sealed when not in use, as the hydroxyl and amine functionality makes the material hygroscopic in character and prone to moisture pickup that can affect performance in sensitive reactions. Handle in a fume hood using nitrile gloves, safety goggles, and a laboratory coat, and avoid contact with skin and eyes as well as inhalation of vapour. Transfer using clean, dry glassware to prevent contamination, and return the container promptly to its designated storage location. Consult the manufacturer's safety data sheet before first use and dispose of waste through the laboratory's chemical waste stream.
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