Overview
(S)-(+)-1,1'-Bi-2-naphthol phosphate, commonly referred to as (S)-BINOL phosphate, is a chiral phosphoric acid derivative derived from (S)-BINOL. It is widely recognized for its role in asymmetric synthesis, particularly in reactions requiring high enantioselectivity. The compound's rigid binaphthyl backbone and acidic phosphate group make it an effective catalyst or ligand in various organic transformations. In the pharmaceutical and fine chemical industries, (S)-BINOL phosphate is prized for its ability to induce chirality in synthetic pathways, leading to enantiomerically pure products. Its stability under typical reaction conditions further enhances its utility in industrial applications.
Physical and Chemical Properties
(S)-(+)-1,1'-Bi-2-naphthol phosphate typically appears as a white to off-white crystalline powder. It has a molecular weight of 348.29 g/mol and is soluble in common organic solvents such as dichloromethane and tetrahydrofuran (THF), though it exhibits limited solubility in water. The compound's melting point ranges between 200-220°C, reflecting its thermal stability. The chiral nature of (S)-BINOL phosphate is a defining feature, enabling its use in enantioselective reactions. Its phosphoric acid group provides Brønsted acidity, which is crucial for catalytic activity. The compound is generally stable under inert atmospheres but may degrade upon prolonged exposure to moisture or strong oxidizers.
Main Applications
(S)-BINOL phosphate is primarily employed in asymmetric catalysis, where it serves as a chiral Brønsted acid catalyst. It is instrumental in reactions such as asymmetric Mannich reactions, Friedel-Crafts alkylations, and transfer hydrogenations, yielding high enantiomeric excesses. The compound's versatility extends to the synthesis of pharmaceuticals, agrochemicals, and specialty chemicals. In the pharmaceutical industry, (S)-BINOL phosphate is used to produce enantiomerically pure intermediates for drugs targeting central nervous system disorders, cardiovascular diseases, and other therapeutic areas. Its application in fine chemical synthesis also includes the preparation of chiral ligands and auxiliaries for further catalytic processes.
Safety and Storage
Proper handling of (S)-(+)-1,1'-Bi-2-naphthol phosphate requires adherence to standard laboratory safety protocols. The compound should be stored in a cool, dry environment, preferably under inert gas to prevent moisture absorption. Exposure to strong oxidizers should be avoided to prevent decomposition. Personal protective equipment (PPE), including gloves and safety goggles, is recommended when handling the compound. In case of skin contact, wash immediately with soap and water. For eye exposure, rinse thoroughly with water and seek medical attention if irritation persists. Always work in a well-ventilated area or under a fume hood to minimize inhalation risks.
B2B Procurement Guide
When procuring (S)-BINOL phosphate for industrial or research purposes, prioritize suppliers with a proven track record in chiral chemicals. Key considerations include verifying the compound's enantiomeric purity (typically ≥99%) and batch-to-batch consistency, as impurities can significantly impact catalytic performance. Pricing varies based on purity and quantity, with bulk purchases often attracting discounts. For reference, prices range from approximately $50 to $200 per gram. Request certificates of analysis (CoA) and material safety data sheets (MSDS) to ensure compliance with regulatory standards. Lead times may vary, so plan procurement accordingly to avoid project delays.
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