2-Amino-3-(2-chlorophenyl)propan-1-ol

This compound is typically obtained as a white to off-white crystalline powder. Its molecular formula is C9H12ClNO, corresponding to a molecular weight of 185.65. The melting point generally falls within the range of 92–96°C. The calculated density is approximately 1.23 g/cm³ under ambient conditions. It is soluble in polar organic solvents such as methanol, ethanol, and dimethyl sulfoxide, moderately soluble in water due to the amino and hydroxyl groups, and sparingly soluble in nonpolar solvents like dichloromethane and hexane. The molecule features a primary amine, a primary alcohol, and a 2-chlorophenyl substituent on a three-carbon backbone, creating a chiral center at the carbon bearing the amino group. The amine and alcohol functionalities can participate in hydrogen bonding and are susceptible to acylation, alkylation, and oxidation reactions. It should be stored in tightly sealed containers protected from light and moisture under cool, dry conditions. Contact with strong oxidizing agents and acid chlorides should be avoided.

2-Amino-3-(2-chlorophenyl)propan-1-ol is a chiral amino alcohol combining a primary amine, a primary alcohol, and an ortho-chlorinated aromatic ring within a compact molecular framework. The molecule features a three-carbon chain with the amine at the 2-position and the alcohol at the 1-position, creating a 1,2-amino alcohol motif that is a common pharmacophore in medicinal chemistry and a versatile ligand in asymmetric catalysis. The ortho-chlorophenyl substituent introduces both electron-withdrawing character and steric hindrance, which can influence the reactivity of the adjacent functional groups and modulate interactions with biological targets. The amino alcohol moiety can chelate metal ions, forming stable complexes with well-defined geometries, and can participate in hydrogen bonding networks essential for molecular recognition. This combination of a modifiable amine, a reactive alcohol, and a halogenated aromatic ring makes the compound a valuable building block in pharmaceutical synthesis, coordination chemistry, and materials science.

Pharmaceutical Intermediate
This chiral amino alcohol is employed in the synthesis of compounds with potential activity as beta-adrenergic receptor antagonists, antihypertensive agents, and anticonvulsants. The 1,2-amino alcohol motif is a key structural feature in numerous drugs, including beta-blockers, where it interacts with receptor binding sites through hydrogen bonding and electrostatic interactions. The amine can be acylated or alkylated to introduce pharmacophoric groups, while the alcohol provides a handle for esterification or ether formation to modulate pharmacokinetic properties. The 2-chlorophenyl group contributes to lipophilicity and target binding affinity.

Building Block for Asymmetric Catalysis
The chiral center and chelating ability of this amino alcohol make it valuable as a ligand precursor or chiral auxiliary in asymmetric synthesis. It can be converted to oxazolines, imines, or other coordinating ligands for transition metals, enabling enantioselective transformations such as hydrogenation, alkylation, and allylic substitution. The ortho-chlorine atom can influence the stereochemical environment around the metal center, contributing to high enantioselectivity in catalytic reactions.

Ligand for Metal Complexes
The amino alcohol moiety acts as a bidentate ligand capable of coordinating to transition metals through both nitrogen and oxygen atoms, forming stable chelate complexes with well-defined geometries. Metal complexes derived from this ligand are investigated for their catalytic activity in oxidation and cross-coupling reactions, as well as for their potential as models for metalloenzyme active sites. The 2-chlorophenyl group influences the electronic properties and steric environment of the metal center, enabling fine-tuning of reactivity and selectivity.

Organic Synthesis Building Block
As a versatile synthetic intermediate, 2-amino-3-(2-chlorophenyl)propan-1-ol participates in diverse transformations including N-acylation, O-alkylation, and Mitsunobu reactions. The amino and alcohol groups can be selectively protected to enable sequential functionalization, allowing the construction of complex molecular architectures. The chlorine atom provides a site for palladium-catalyzed cross-couplings such as Suzuki and Buchwald-Hartwig reactions, enabling the introduction of diverse aryl, heteroaryl, or amino groups. Its utility extends to the synthesis of natural product analogs and functional materials where the combination of a chiral amino alcohol and a halogenated aromatic core provides opportunities for controlled molecular elaboration.