1780-31-0

Basic information

• Product Name: 2,4-Dichloro-5-methylpyrimidine
• Synonyms: 2,4-dichloro-5-methyl-pyrimidin;2,4-DICHLORO-5-METHYLPYRIMIDINE;2,4-Dichloro-5-methylpyrimidine **Toxic, Stench**;Toxic,stench;PYRIMIDINE,2,4-DICHLORO-5-METHYL;2,4-Dichloro-5-;5-Methyl-2,4-dichloropyrimidine;NSC 37532
• CAS NO: 1780-31-0
• Molecular Formula: C₅H₄Cl₂N₂
• Molecular Weight: 163
• EINECS: 217-227-8
• Product Categories: Halides;Heterocycles;pharmacetical;Pyrimidine;Building Blocks;Halogenated;Nucleotides and Nucleosides;Pyrimidines;Nucleic acids;Bases & Related Reagents;Nucleotides;Building Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks;PyrimidinesHeterocyclic Building Blocks;C4 to C5;Chemical Synthesis;Halogenated Heterocycles;Heterocyclic Building Blocks;Heterocycle-Pyrimidine series
• Mol File: 1780-31-0.mol
• Article Data: 16

Chemical Properties

• Melting Point: 26-28 °C(lit.)
• Boiling Point: 108-109 °C11 mm Hg(lit.)
• Flash Point: >230 °F
• Appearance: white to off white low melting solid
• Density: 1.39 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.079mmHg at 25°C
• Refractive Index: 1.6300 (estimate)
• Storage Temp.: −20°C
• Solubility: Soluble in chloroform, ether, ethyl acetate and toluene
• PKA: -2.44±0.29(Predicted)
• Sensitive: Lachrymatory
• CAS DataBase Reference: 2,4-Dichloro-5-methylpyrimidine(CAS DataBase Reference)
• NIST Chemistry Reference: 2,4-Dichloro-5-methylpyrimidine(1780-31-0)
• EPA Substance Registry System: 2,4-Dichloro-5-methylpyrimidine(1780-31-0)

Safety Data

• Hazard Codes: C
• Statements: 34
• Safety Statements: 26-36/37/39-45-27
• RIDADR: UN 3261 8/PG 2
• WGK Germany: 3
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 1780-31-0(Hazardous Substances Data)

Usage

Chemical Properties

White to Off White Low Melting Solid

Uses

2,4-Dichloro-5-methylpyrimidine, is used in the synthesis of (2-chloro-6-methyl-pyrimidin-4-yl)-(2,3-dihydro-benzothiazol-6-yl)-amine. It can react with piperidineto produce 2-chloro-5-methyl-4-piperidin-1-yl-pyrimidine. This reaction will need solvent dioxane.

InChI:InChI=1/C5H4Cl2N2/c1-3-2-8-5(7)9-4(3)6/h2H,1H3

Upstream product

• 65-71-4 2,4-dihydroxy-5-methylpyrimidine 
• 65-71-4 thymin 

Downstream Products

• 5151-34-8 2,4-Dimethoxy-5-methylpyrimidine 
• 7193-87-5 2,4-diethoxy-5-methylpyrimidine 
• 2036-41-1 5-methylpyrimidine 
• 859065-25-1 5-Methyl-tetrahydropyrimidin 
• 62968-33-6 2-chloro-5-methyl-4-piperidinopyrimidine 
• 141924-02-9 4-chloro-5-methyl-2-piperidinopyrimidine 
• 28942-78-1 4-Diethylamino-5-methyl-pyrimidin 
• 96548-89-9 2,4-difluoro-5-methylpyrimidine 
• 153600-16-9 2,4-Dichloro-5-trichloromethylpyrimidine 
• 34916-68-2 2-Chloro-4,5-dimethyl-pyrimidine 
• 204636-94-2 2-chloro-5-methyl-4-(2-trimethylsilanylethoxy)pyrimidine 
• 226905-77-7 (2-chloro-5-methyl-4-pyrimidinyl)[3-(trifluoromethyl)phenyl]methanone 
• 280581-49-9 2-chloro-5-methyl-N-phenylpyrimidin-4-amine 
• 638168-61-3 2-chloro-5-methyl-4-(N-propylamino)pyrimidine 

Relevant articles and documents

Synthesis method 2 -fluoro -5 -trifluoromethyl pyrimidine

The invention relates to the technical field of drug synthesis, and provides a synthesis method of 2 -fluoro -5 -trifluoromethyl pyrimidine. 5 - Methyluracil is used as a raw material and is subjected to cyclic chlorination reaction. Redox reaction, chlorination reaction and fluorination reaction obtain the target product, the process is simple, the raw materials are cheap and easily available, the yield is high, and no heavy metal pollution is generated in the whole process. In the chlorination reaction, phosphorus oxychloride is used for chlorination, chlorine is used for chlorination in the chlorination reaction, the cost of the chlorination reaction is low, phosphorus pentachloride is used for recycling phosphorus oxychloride in the cyclochlorination reaction, and the reaction cost can be further reduced.

Preparation method of chloro-substituted polyhydroxy aza-aromatic ring compound (by machine translation)

The invention discloses a preparation method, namely BTC and SOCl, of a chloropolyhydroxyl aza heteroaromatic ring compound as a raw material with a polyhydroxy aza heteroaromatic ring compound as a raw material, and a preparation method thereof. 2 As the double chlorination reagent, a chloropolyhydroxyl aza-aromatic ring compound is produced by chlorination reaction with 4 - dimethylaminopyridine (DMAP) as a catalyst at room temperature to reflux temperature of the reaction, as a catalyst. BTC TC TC TC2 /DMDMAP chlorination system has high efficiency, high selectivity and chlorine substitution on a polyhydroxy nitrogen heterocyclic compound; the system can replace POCl3 , The production of phosphorus-containing wastewater is avoided. Using BTC as a chlorination reagent, the reaction by-product was HCl and CO. 2 . From the aspects of industrial wastewater treatment, environmental protection and the like, the advantages thereof are obvious; SOCl is distilled off after the reaction is ended. 2 The quantity is almost no loss, can be used repeatedly, and reduces the process cost. (by machine translation)

Large-scale solvent-free chlorination of hydroxy-pyrimidines,-pyridines,- pyrazines and-amides using equimolar POCl3

Chlorination with equimolar POCl3 can be efficiently achieved not only for hydroxypyrimidines, but also for many other substrates such as 2-hydroxy-pyridines,-quinoxalines, or even-amides. The procedure is solvent-free and involves heating in a sealed reactor at high temperatures using one equivalent of pyridine as base. It is suitable for large scale (multigram) batch preparations.