4-Morpholinobutanenitrile

This compound is typically obtained as a clear, colorless to pale yellow liquid at ambient temperature, possessing a faint amine-like odor. Its molecular formula is C8H14N2O, corresponding to a molecular weight of 154.21. The boiling point is approximately 140–145 °C at reduced pressure (10 mmHg), with a calculated density near 1.01 g/cm³ at 20 °C. It is miscible with common organic solvents including dichloromethane, ethanol, and ethyl acetate, while showing moderate solubility in water due to the polar morpholine ring and limited solubility in aliphatic hydrocarbons such as hexane. The molecule consists of a morpholine ring connected via a fourcarbon chain to a terminal nitrile group. The morpholine nitrogen is basic and can participate in hydrogen bonding, while the nitrile is susceptible to reduction and hydrolysis. Storage in tightly sealed containers under inert atmosphere at reduced temperature is recommended to prevent decomposition. Contact with strong acids, strong bases, and strong reducing agents should be avoided.

4Morpholinobutanenitrile is a bifunctional molecule combining a saturated morpholine heterocycle with a butyronitrile chain. The morpholine ring, a sixmembered ring containing both oxygen and nitrogen atoms, provides both hydrogen bond accepting capability and basic character, enabling interactions with biological targets and metal ions. The butanenitrile chain introduces a flexible spacer terminated with a nitrile group, which serves as a masked carboxylic acid or amine equivalent. The nitrile can be reduced to the corresponding primary amine for further functionalization or hydrolyzed to the carboxylic acid under appropriate conditions. This combination of a polar, basic heterocycle with a modifiable nitrile handle makes the compound a versatile building block in organic synthesis and medicinal chemistry for constructing more complex molecules, where the morpholine ring can enhance aqueous solubility and the nitrile provides a point for diversification.

Pharmaceutical Intermediate
In drug discovery, this morpholine nitrile is employed as a building block for synthesizing compounds with potential activity against cancer and neurological disorders. The nitrile group can be reduced to an amine for incorporation into pharmacophores or hydrolyzed to a carboxylic acid for amide coupling. The morpholine ring is a privileged scaffold in medicinal chemistry, appearing in numerous drugs where it can improve solubility and modulate receptor interactions through hydrogen bonding and basic character.

Building Block for Heterocyclic Systems
The compound serves as a precursor for constructing nitrogen-containing heterocycles such as imidazolines, tetrahydropyrimidines, and triazoles through cyclization reactions involving the nitrile group. The morpholine ring can be retained to enhance solubility or modified to introduce additional diversity. These ring systems are investigated for their pharmacological properties, with applications in antimicrobial and antiinflammatory drug development.

Surfactant and Emulsifier Component
The amphiphilic nature of 4morpholinobutanenitrile, combining a polar head group with a hydrophobic alkyl chain, makes it valuable for preparing surfactants and emulsifiers. Reduction of the nitrile to an amine followed by quaternization yields cationic surfactants, while hydrolysis to the carboxylic acid enables the preparation of anionic surfactants. These materials find applications in detergents, personal care products, and industrial formulations.

Organic Synthesis Building Block
As a versatile synthetic intermediate, 4morpholinobutanenitrile participates in diverse transformations including nitrile reduction to primary amines, hydrolysis to carboxylic acids, and nucleophilic addition reactions. The morpholine nitrogen can be alkylated or acylated to further elaborate the scaffold. Its utility extends to the synthesis of ligands for metal complexes and functional materials where the combination of a basic amine and a modifiable nitrile provides opportunities for controlled molecular assembly.