Description

[Ar,(-)]-1,1'-Binaphthalene CAS NO 24161-30-6 is a high-purity, enantiomerically pure binaphthyl derivative, a crucial chiral auxiliary and ligand in asymmetric synthesis. Its value lies in its ability to induce high enantioselectivity in a wide range of catalytic and stoichiometric organic transformations, directly impacting the efficiency and cost of producing optically active compounds. This product is essential for research and development laboratories, pharmaceutical intermediates manufacturing, and fine chemical synthesis where precise stereochemical control is paramount.

Application

• As a chiral ligand in transition metal catalysis for asymmetric hydrogenation, C-C bond formation, and oxidation reactions.
• As a chiral resolving agent for the separation of racemic mixtures of acids, amines, and alcohols.
• As a key building block (chiral auxiliary) in the stereoselective synthesis of complex natural products and active pharmaceutical ingredients (APIs).
• In the development of chiral stationary phases (CSPs) for high-performance liquid chromatography (HPLC) to separate enantiomers.
• For the synthesis of chiral polymers and materials with potential applications in nonlinear optics and molecular recognition.
• In academic and industrial research focused on asymmetric organocatalysis and novel catalytic system design.

Basic Information

Product Name	[Ar,(-)]-1,1'-Binaphthalene
CAS No.	24161-30-6
Molecular Formula	C₂₀H₁₄
Molecular Weight	254.33 g/mol
Synonyms	(-)-1,1'-Binaphthyl; (S)-(-)-1,1'-Binaphthyl; (S)-1,1'-Binaphthalene; (S)-BINAP Precursor; (S)-(-)-1,1'-Binaphthalen-2,2'-diyl; (S)-BINOL; (S)-1,1'-Bi-2-naphthol (common misnomer, related compound); Ar-BINAP (related ligand)
EINECS	Contact for details

Quality Control

Our [Ar,(-)]-1,1'-Binaphthalene is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chiral purity assessment by HPLC, to ensure compliance with stringent specifications for enantiomeric excess (ee) and chemical purity. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and specific rotation is provided with every shipment, supporting cGMP and ISO standards for traceability and reliability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong bases and incompatible organic solvents. For long-term storage under inert atmosphere, please contact our technical team for specific recommendations.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Enantiomeric Excess (ee)	≥ 99.0%
Specific Rotation [α]	-35.0° to -37.0° (c=1 in THF)
Melting Point	205 - 210 °C
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.