4-Amino-2-methylbutan-1-ol

This compound is typically encountered as a clear, colorless to pale yellow viscous liquid at ambient temperature, possessing a faint amine-like odor. Its molecular formula is C5H13NO, corresponding to a molecular weight of 103.16. The boiling point is approximately 200–205 ℃ at atmospheric pressure, with a calculated density near 0.96 g/cm³ at 20 ℃. It is miscible with water and common organic solvents including methanol, ethanol, and dichloromethane, reflecting its amphiphilic character. The molecule contains both a primary amine and a primary alcohol separated by a threecarbon chain with a methyl branch at the 2position. The amine is susceptible to acylation, alkylation, and condensation reactions, while the alcohol can undergo oxidation, esterification, and etherification. The compound is hygroscopic and may absorb carbon dioxide from air to form carbamate salts. Storage in tightly sealed containers under inert atmosphere at reduced temperature is recommended. Contact with strong oxidizing agents, acid chlorides, and isocyanates should be avoided.

4Amino2methylbutan1ol is a chiral amino alcohol featuring a branched fourcarbon backbone with an amine at one terminus and a hydroxyl at the other. The methyl branch at the 2position introduces a stereogenic center, making the compound optically active when resolved. This structural motif combines the nucleophilicity of a primary amine with the hydrogenbonding capacity of a primary alcohol within a compact, flexible framework. The two functional groups are positioned to allow chelation with metal ions or participation in intramolecular hydrogen bonding, influencing both reactivity and conformation. Amino alcohols of this type are valuable in asymmetric synthesis as chiral auxiliaries, ligands, and building blocks for pharmaceuticals. The branched alkyl chain imparts moderate lipophilicity, balancing water solubility with membrane permeability.

This amino alcohol serves as a versatile starting material for preparing chiral ligands and organocatalysts used in enantioselective transformations such as hydrogenation, alkylation, and aldol reactions. The primary amine can be converted to oxazolines, imines, or other coordinating groups, while the hydroxyl provides an anchoring point for metal binding. The branched structure creates a welldefined chiral environment essential for achieving high enantioselectivity in catalytic processes.

In drug discovery, 4amino2methylbutan1ol is employed in the synthesis of compounds targeting neurological disorders and metabolic diseases. The amino alcohol moiety appears in several bioactive molecules, including enzyme inhibitors and receptor modulators, where it can participate in hydrogen bonding with active site residues. The chiral center allows for the preparation of enantiomerically pure drug candidates with optimized pharmacological profiles.

The amphiphilic nature of this compound makes it valuable for preparing nonionic and cationic surfactants. Reaction with fatty acids yields amides with surfaceactive properties, while quaternization of the amine produces cationic surfactants used in fabric softeners, hair conditioners, and industrial formulations. The branched alkyl chain contributes to enhanced emulsifying power and stability in various formulations.

The combination of amine and alcohol donors enables this compound to act as a bidentate ligand for transition metals, forming stable chelate complexes. These metal complexes are investigated for their catalytic activity in oxidation and crosscoupling reactions, as well as for their potential as MRI contrast agents and models for metalloenzyme active sites. The methyl branch can influence the stereochemistry and stability of the resulting complexes.

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