Overview
(R)-(-)-3-Quinuclidinol is a bicyclic chiral alcohol widely used as a pharmaceutical intermediate. Its rigid structure and stereochemical properties make it valuable in synthesizing bioactive compounds, particularly antispasmodic agents like solifenacin. The compound is synthesized via asymmetric reduction or resolution methods to achieve high enantiomeric excess (ee). Industrially, it is supplied as a white crystalline powder with strict purity requirements. Due to its role in critical drug syntheses, manufacturers must adhere to Good Manufacturing Practices (GMP) to ensure consistency and regulatory compliance.
Physical and Chemical Properties
(R)-(-)-3-Quinuclidinol exhibits a melting point of 110-112°C and is soluble in polar solvents, including water and alcohols. Its bicyclic [2.2.2] structure imparts rigidity, while the hydroxyl group allows for further functionalization. The compound is stable under ambient conditions but may degrade upon prolonged exposure to light or moisture. Key spectroscopic data includes characteristic IR absorption for the hydroxyl group (∼3300 cm⁻¹) and NMR signals consistent with its bicyclic framework. Chiral HPLC or polarimetry is used to confirm optical purity, typically specified at ≥99% ee for pharmaceutical use.
Main Applications
The primary application of (R)-(-)-3-Quinuclidinol is in synthesizing anticholinergic drugs such as solifenacin (used for overactive bladder) and darifenacin. Its chiral center is critical for binding to muscarinic receptors, enhancing drug efficacy and reducing side effects. Beyond pharmaceuticals, it serves as a ligand in asymmetric catalysis and a building block for agrochemicals. However, pharmaceutical applications dominate demand, with stringent quality controls to meet FDA or EMA standards for impurities and stereochemical purity.
Safety and Storage
(R)-(-)-3-Quinuclidinol requires careful handling due to potential irritation to eyes, skin, and respiratory system. Always use gloves, goggles, and lab coats in well-ventilated areas. Spills should be contained with inert absorbents and disposed of as hazardous waste. Storage recommendations include airtight containers under nitrogen or argon to prevent oxidation. Temperature should be maintained below 25°C, with desiccants to minimize moisture uptake. Shelf life is typically 2-3 years when stored properly.
B2B Procurement Guide
When procuring (R)-(-)-3-Quinuclidinol, prioritize suppliers with GMP certification and documented quality control processes. Request Certificates of Analysis (COA) detailing purity, chiral purity, residual solvents, and heavy metals. Bulk orders (kilogram scale) may offer cost advantages but require validation of batch-to-batch consistency. Logistics should ensure temperature-controlled shipping to prevent degradation. For international procurement, confirm compliance with REACH, TSCA, or other regional regulations. Alternative chiral intermediates (e.g., (S)-isomer) should be evaluated for cost and compatibility with synthesis routes.
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