41295-64-1

Basic information

• Product Name: 4-chloro-3-oxobutyryl chloride
• Synonyms: 4-chloro-3-oxobutyryl chloride;Butanoyl chloride,4-chloro-3-oxo-;4-Chloro-3-oxobutanoyl chloride
• CAS NO: 41295-64-1
• Molecular Formula: C₄H₄Cl₂O₂
• Molecular Weight: 154.97936
• EINECS: 255-301-1
• Mol File: 41295-64-1.mol
• Article Data: 12

Chemical Properties

• Boiling Point: 214.91°C (rough estimate)
• Flash Point: 79.3°C
• Appearance: /
• Density: 1.4397
• Vapor Pressure: 0.299mmHg at 25°C
• Refractive Index: 1.4860 (estimate)
• PKA: 7.07±0.46(Predicted)
• CAS DataBase Reference: 4-chloro-3-oxobutyryl chloride(CAS DataBase Reference)
• NIST Chemistry Reference: 4-chloro-3-oxobutyryl chloride(41295-64-1)
• EPA Substance Registry System: 4-chloro-3-oxobutyryl chloride(41295-64-1)

Safety Data

• Hazardous Substances Data: 41295-64-1(Hazardous Substances Data)

Usage

Uses

4-Chloroacetoacetyl Chloride is an impurity of Amlodipine Besylate(A633500); is a dihydropyridine calcium channel blocker. Used as an antianginal and antihypertensive. 4-Chloroacetoacetyl Chloride is used in preparation of Dioxohexanoate by Chlorination of Methyleneoxetanone followed by condensation with Meldrum''s acid and esterification.

InChI:InChI=1/C4H4Cl2O2/c5-2-3(7)1-4(6)8/h1-2H2

Upstream product

• 15159-48-5 2,4-oxetanedione 
• 674-82-8 4-methyleneoxetan-2-one 
• 56-23-5 tetrachloromethane 
• 7782-50-5 chlorine 

Downstream Products

• 18592-13-7 6-chloromethyluracil 
• 19359-28-5 2-chloro-N-(4-chlorophenyl)-3-oxobutanamide 
• 31124-02-4 2-chloroacetoacetic acid-4'-methoxyanilide 
• 4116-10-3 α-chloro-N-methylacetoacetamide 
• 1228365-47-6 C₁₀H₈ClF₂NO₂ 
• 912264-33-6 4-chloro-N-(2-fluoro-5-nitrophenyl)-3-oxobutyramide 
• 871267-25-3 C₁₁H₁₂ClNO₃ 
• 61610-54-6 4-chloro-3-oxo-N-(p-tolyl)butyramide 
• 400024-02-4 C₁₀H₉Cl₂NO₂ 
• 71919-02-3 4-Chloro-N-(4-methoxy-phenyl)-3-oxo-butyramide 
• 871267-32-2 C₁₀H₈Cl₃NO₂ 
• 1228365-48-7 C₁₂H₁₄ClNO₃ 
• 61610-51-3 4-chloro-3-oxo-N-(4-fluorophenyl)butaneamide 
• 400024-03-5 C₁₀H₉BrClNO₂ 

Relevant articles and documents

Preparation method of ethyl 4-chloroacetoacetate

The invention discloses a preparation method of ethyl 4-chloroacetoacetate, which specifically comprises the following steps of: (1) chlorination: cooling dichloromethane for the first time, then adding acetyl ketene for cooling for the second time, then introducing chlorine gas, and keeping the temperature; (2) esterification: dropwise adding absolute ethyl alcohol, and keeping the temperature; (3) desolvation and deacidification: heating and distilling to remove dichloromethane and hydrogen chloride; and (4) rectification: rectifying and purifying to obtain the product. Acetyl ketene is used as a raw material, the raw material is low in cost and easy to obtain, the synthesis steps are simple, and the production cost is reduced; by optimizing the ratio of process materials, the selectivity of the product ethyl 4-chloroacetoacetate is improved, and the yield is increased; and through high-vacuum low-temperature distillation, the decomposition of the heat-sensitive product ethyl 4-chloroacetoacetate is effectively prevented, and the yield and the product quality are improved.

Continuous device and method for industrial production 4 - chloroacetoacetate

The invention relates to an industrial production 4 - chloroacetoacetate continuous device and a method. The device and method can inhibit the generation of byproduct 2 - chloroacetoacetate and 4 - chloroacetoacetate in 2 - chloroacetoacetate crude product can be controlled below 0.15%. The yield of 4 - chloroacetoacetate can be improved, and the yield 4 - chloroacetoacetate can reach 97% or more. The continuous device and the method provided by the invention can be operated continuously, 4 - chloroacetoacetate can be industrially produced, and the continuous device has remarkable economic value.

PREPARATION OF 3,5-DIOXO HEXANOATE ESTER IN TWO STEPS

The invention discloses a method for the preparation of tert-butyl 6-chloro-3,5- dioxohexanoate from Meldrum's acid derivative and its use for the preparation of tert-butyl (4R,6S)-(6-hydroxymethyl-2,2-dimethyl-1,3-dioxan-4-yl)acetate(BHA), Rosuvastatin and Atorvastatin.