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Phenyl dichlorophosphate (chemical formula C6H5OPOCl2) is an important organic phosphorus compound. At room temperature, it is a colorless to pale yellow corrosive liquid with a pungent odor. It is mainly produced by the reaction of phenol with trichlorophosphine. The two highly reactive chlorine atoms in its molecular structure and the phenolic oxygen group make it an efficient phosphating reagent and dehydrating agent widely used in organic synthesis. It is particularly crucial in the phosphorylation reactions of nucleotides, amino acids, and alcohols. This compound will undergo intense hydrolysis upon contact with water, releasing hydrogen chloride gas. Therefore, it must be handled and stored carefully in anhydrous conditions, and strict anti-corrosion and ventilation facilities must be provided. At the same time, it has strong irritancy and corrosiveness to the skin, eyes, and respiratory mucosa, and can cause severe chemical burns. Personal protective equipment must be worn during operation. Additionally, phenyl dichlorophosphate is also a key precursor for the synthesis of pesticides, flame retardants, and drug intermediates. It holds an irreplaceable position in industry and laboratories, but its high toxicity and environmental hazards require strict management of its use and waste disposal.
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Chemical Formula |
C6H5Cl2O2P |
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Exact Mass |
210 |
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Molecular Weight |
211 |
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m/z |
210 (100.0%), 212 (63.9%), 214 (10.2%), 211 (6.5%), 213 (4.1%) |
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Elemental Analysis |
C, 34.16; H, 2.39; Cl, 33.61; O, 15.17; P, 14.68 |
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Compared with other phosphoryl chloride compounds, PDCP has very high phosphorylation. It is a phosphoryl reagent widely used in organic synthesis to prepare symmetric phosphodiester compounds.
As an effective activating agent, it can induce the condensation reaction between carboxylic acid and sulfide in the presence of pyridine to obtain thioxylates with high yield. Other chlorophosphates, such as (PhO) 2P (O) Cl and (EtO) 2P (O) Cl, are difficult to directly induce the direct conversion of carboxylic acid to thioxylate as PDCP does.
It can also be used for β- The halogenation of diketones can be effectively induced by PDCP in the presence of alkali (such as lithium hydride) β- Diketone orientation β- hlorine- α,β- Conversion of unsaturated ketones.
It is also an effective DMSO activating reagent in Pftizner Moffatt reaction. The complexes formed with DMSO can be used as oxidants to induce the conversion of primary or secondary alcohols to aldehydes or ketones.
The reflux of phenyl dichlorophosphate and sodium iodide in acetonitrile can directly realize the conversion of ether to alkyl iodide.
PDCP can also be used as an effective activating agent for breaking C-O bond and C-S bond. Ketals or thioacetals can be converted into corresponding ketones respectively under the action of PDCP and sodium iodide.
It can also form complexes with dimethylformamide (DMF), thus effectively realizing one-step esterification of carboxylic acid substrate. This method is especially suitable for esterification of polysubstituted malonic acids, and can effectively avoid decarboxylation of diesters.
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Preparation of phenyl dichlorophosphate:
1. Synthesis process
In a 500mL three necked flask, 359g (2.3mol) of phosphorus oxychloride is added, heated in an oil bath, and the liquid temperature rises to 80-90 ℃. During this process, the system emits HCl white smoke and maintains the temperature. When no white smoke is emitted, the equipment is dried, that is, 7.5g (0.068mol) of quaternary ammonium salt catalyst is added, and the liquid temperature is maintained at 80-90 ℃. Phenol shall be heated and dissolved in advance. After 150g (1.56mol) of dissolved phenol is added into the dropping funnel, phenol shall be dropped into the three necked flask within the liquid temperature range of 80-90 ℃. The dropping speed shall be uniform. Tail gas shall be discharged and the temperature shall not be too high. Otherwise, side reactions will occur. After dropping phenol, keep the reaction at 80-92 ℃ until no white smoke is emitted from the tail gas, and then raise the temperature to 92-120 ℃. The reaction end point is when there is little white smoke from the tail gas; The tail gas shall be introduced into the water flow pump absorption system, and the reaction time is about 4h.
2. Distillation and cutting process
(1) Excess phosphorus oxychloride is heated and evaporated under normal pressure in atmospheric distillation. When the gas phase temperature rises to 120 ℃, no distillate is evaporated and atmospheric distillation is stopped.
(2) Vacuum distillation Conditions of distillate before vacuum distillation: gas phase temperature: 140 ℃, liquid phase temperature: 145-150 ℃, vacuum degree: 0-93310Pa The conditions for collecting products are gas phase temperature: 140-141 ℃, liquid phase temperature: 146-150 ℃, vacuum degree: 9464.3Pa. The collected products are high content it, weight: 250g, content ≥ 96%, yield about 73%.
Scope of sales channels
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Large scale chemical raw material e-commerce
The platform provides a secure trading environment, supports multiple payment methods, and takes measures to ensure the security of transaction funds. At the same time, the platform also provides corresponding complaint and handling mechanisms for disputes that may arise during the transaction process, safeguarding the legitimate rights and interests of both buyers and sellers. Customers can evaluate and provide feedback on the products and suppliers they purchase on the platform. Other customers can use these evaluations to understand the quality of the products, the services provided by the suppliers, and make more informed purchasing decisions.
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Some sales websites that focus on specific chemical fields, such as those that specialize in the sales of organic phosphorus compounds, will focus on promoting related products such as phenyl dichlorophosphate. These websites have a deep understanding of products in this field and can provide customers with more professional product information and technical support. In addition to product sales, these websites also provide industry news, technical articles, and other content to help customers understand industry trends and technological developments.
Segmented field chemical raw material sales website
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2.Direct sales channels for chemical production enterprises
Official website of manufacturing enterprises
The official website of chemical production enterprises is one of their important sales channels. Enterprises will display detailed product information of phenyl dichlorophosphate on their website, including chemical properties, physical properties, quality standards, application areas, etc. For example, the website will clearly label the purity, moisture content, appearance and other indicators of the product, allowing customers to have a comprehensive understanding of the product. Websites usually provide online consultation functions, where customers can communicate with enterprise customer service personnel at any time to learn about product prices, inventory, delivery times, and other information.
Official website of manufacturing enterprises
At the same time, some companies also support online ordering, where customers can directly complete the purchasing process on the website, improving procurement efficiency. Through the official website, companies can showcase their production scale, technical strength, quality certification, and other information, enhancing customers' trust in the company. For example, the website will display photos of the company's production workshop, quality management system certification certificates, etc., allowing customers to understand the company's production capacity and quality control level.
Production enterprise sales team
The sales team of chemical production enterprises is an important force directly facing customers. The sales team will proactively communicate with customers, understand their needs and usage, and provide personalized solutions for them. For example, for long-term cooperative customers, the sales team will conduct regular follow-up visits to promptly solve problems encountered by customers, improve customer satisfaction and loyalty. The sales team will actively participate in various chemical exhibitions, industry seminars, and other activities to promote phenyl dichlorophosphate products and expand customer resources.
Production enterprise sales team
During the event, salespeople will have face-to-face communication and negotiations with customers, introducing the advantages and application cases of the product, and striving to reach cooperation intentions. The sales team is not only responsible for product sales, but also provides technical support and after-sales service to customers. For example, when customers encounter technical problems while using the product, sales personnel will coordinate with the company's technical department to provide solutions for customers; For product quality issues, the sales team will promptly handle customer complaints and return/exchange requests.
3.Chemical traders and distributors channels
Domestic chemical traders
Domestic chemical traders have strong channel advantages and service capabilities in the local market. They are familiar with the needs and market conditions of local customers and can provide timely product supply and technical support to them. For example, traders will set up warehouses locally to store a certain amount of phenyl dichlorophosphate products, ensuring that customers can obtain the required goods in a timely manner. Traders, with their cooperative relationships with multiple production enterprises, are able to negotiate more favorable conditions in price negotiations and provide customers with more competitive prices.
Domestic chemical traders
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