For scientists and engineers working at the forefront of chemical synthesis, a deep understanding of intermediates is crucial. 2,3-Dichlorobenzoyl Cyanide, identified by its CAS number 77668-42-9, is a compound of significant interest, particularly within the electronic chemicals sector and as a pharmaceutical intermediate. This article explores its key chemical properties and common synthesis routes, providing valuable insights for procurement and R&D professionals.

Chemical Profile of 2,3-Dichlorobenzoyl Cyanide

At its core, 2,3-Dichlorobenzoyl Cyanide is characterized by its molecular formula, C8H3Cl2NO, and a molecular weight of approximately 200.02 g/mol. Physically, it presents as a white solid, with a melting point typically ranging between 58-61°C. Its density is noted around 1.446 g/cm³, and it possesses a boiling point of approximately 309°C at standard atmospheric pressure. These physical and chemical properties are essential for handling, storage, and process design.

The compound is also known by alternative names such as (2,3-Dichlorophenyl)oxoacetonitrile or 2,3-Dichlorobenzoyl nitrile. Its EINECS number is 278-747-9. The presence of two chlorine atoms on the phenyl ring, along with the benzoyl cyanide moiety, dictates its reactivity and suitability for various synthetic pathways.

Synthesis Pathways and Manufacturing Considerations

The synthesis of 2,3-Dichlorobenzoyl Cyanide typically involves reactions starting from readily available precursors. One common method involves the reaction of 2,3-Dichlorobenzoyl chloride with a cyanide source, such as sodium cyanide or cuprous cyanide, often in a suitable solvent like acetonitrile. The process requires careful control of reaction conditions, including temperature, addition rates, and stoichiometry, to ensure high yields and purity. Filtration to remove inorganic salts and subsequent purification steps, such as vacuum distillation, are critical for obtaining the desired product quality. Manufacturers dedicated to producing this intermediate invest in optimizing these processes to ensure consistency and scalability.

Applications and Industrial Significance

The industrial significance of 2,3-Dichlorobenzoyl Cyanide is multifaceted. In the field of electronic chemicals, it serves as a key building block for the synthesis of photoinitiators and other compounds used in photoresist formulations. These photoresists are indispensable for the microfabrication processes that underpin modern electronics manufacturing. The precise molecular structure of 2,3-Dichlorobenzoyl Cyanide allows for targeted reactivity, leading to the formation of the specialized polymers required for creating intricate circuit patterns.

Furthermore, its role as an impurity and intermediate in the synthesis of pharmaceuticals, particularly Lamotrigine, highlights its importance in the pharmaceutical supply chain. Pharmaceutical companies rely on high-purity intermediates to ensure the safety and efficacy of their active pharmaceutical ingredients (APIs).

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