38872-49-0

Basic information

• Product Name: 1-Acetoxy-4-chloro-3-methyl-2-butene
• Synonyms: 1-Acetoxy-4-chloro-3-methyl-2-butene
• CAS NO: 38872-49-0
• Molecular Formula: C₇H₁₁ClO₂
• Molecular Weight: 162.61
• Mol File: 38872-49-0.mol

Chemical Properties

• Boiling Point: 216.8 °C at 760 mmHg
• Flash Point: 94 °C
• Appearance: /
• Density: 1.067
• Vapor Pressure: 0.137mmHg at 25°C
• Refractive Index: 1.45
• CAS DataBase Reference: 1-Acetoxy-4-chloro-3-methyl-2-butene(CAS DataBase Reference)
• NIST Chemistry Reference: 1-Acetoxy-4-chloro-3-methyl-2-butene(38872-49-0)
• EPA Substance Registry System: 1-Acetoxy-4-chloro-3-methyl-2-butene(38872-49-0)

Safety Data

• Hazardous Substances Data: 38872-49-0(Hazardous Substances Data)

Usage

Uses

Used in Pharmaceutical Industry:
1-Acetoxy-4-chloro-3-methyl-2-butene is used as a chemical intermediate for the synthesis of various pharmaceuticals. Its unique structure allows for the development of new drugs with specific therapeutic properties.
Used in Agrochemical Industry:
In the agrochemical industry, 1-Acetoxy-4-chloro-3-methyl-2-butene is utilized as a precursor in the production of agrochemicals, such as pesticides and herbicides, to enhance crop protection and yield.
Used in Specialty Chemicals Production:
1-Acetoxy-4-chloro-3-methyl-2-butene is employed as a building block in the synthesis of specialty chemicals, which have specific applications in various industries, including cosmetics, fragrances, and dyes.
Used in Polymer Production:
1-Acetoxy-4-chloro-3-methyl-2-butene is also used as a monomer in the production of polymers, contributing to the development of new materials with unique properties and applications in various fields, such as plastics, coatings, and adhesives.

InChI:InChI=1/C7H11ClO2/c1-6(5-8)3-4-10-7(2)9/h3H,4-5H2,1-2H3

Upstream product

• 507-40-4 tert-butylhypochlorite 
• 64-19-7 acetic acid 
• 78-79-5 isoprene 
• 20677-65-0 Acetoxymethyl-triphenyl-phosphoniumchlorid 
• 78-95-5 chloroacetone 
• 108-24-7 acetic anhydride 
• 763-32-6 2-methyl-1-buten-4-ol 
• 5205-07-2 3-methyl-3-buten-1-yl acetate 
• 2873-92-9 4-chloro-3-methylbut-2-en-1-ol 
• 7437-62-9 1-chloro-2-methyl-3-buten-2-ol 
• 29843-58-1 1,4-dichloro-3-methyl-2-butene 
• 127-08-2 potassium acetate 
• 23451-76-5 3-Hydroxy-3-methyl-4-phenylmercapto-buten 
• 63753-47-9 1-Benzenesulfinyl-2-methyl-but-3-en-2-ol 

Downstream Products

• 14918-80-0 3-methyl-4-oxobut-2-enyl acetate 
• 26157-20-0 2-methyl-1-(phenylsulfonyl)-1,3-butadiene 
• 53170-97-1 (E)-4-chloro-3-methyl-2-buten-1-ol 
• 187268-44-6 (3E,7E)-2-((E)-4-Acetoxy-2-methyl-but-2-enyl)-2-benzenesulfonyl-4,8,12-trimethyl-trideca-3,7,11-trienoic acid methyl ester 
• 58626-66-7 5-(3-oxo-2,5,5-trimethyl-cyclopent-1-en-1-yl)-5-phenylsulphonyl-3-methylpent 2-en-1-ol 
• 87611-79-8 Acetic acid (E)-4-benzylamino-3-methyl-but-2-enyl ester 
• 26586-02-7 (E)-4-acetoxy-2-methylcrotonaldehyde 
• 59830-31-8 1-phenylsulfonyl-2-methyl-4-acetoxy-but-2-ene 
• 89345-64-2 phenylsulfonyl-1 methyl-2 acetoxy-4 butene-2 Z 
• 95199-58-9 Acetic acid 2-benzenesulfonyl-3-methyl-but-3-enyl ester 
• 53588-13-9 Phenylsulfonyl-4-methyl-3-acetoxy-1-buten-2 
• 53588-14-0 Acetic acid (E)-4-benzenesulfonyl-2-methyl-but-2-enyl ester 

Relevant articles and documents

Preparation method of 4-acetoxy-2-methyl-2-butenal

The invention discloses a preparation method of 4-acetoxy-2-methyl-2-butenal, which takes salifying and wittig reactions as a core and methanol which is cheap and easy to obtain as a reaction initial raw material. The invention provides a new reaction route, the reaction steps are simple, the reaction conditions are mild, and the product yield is high.

Preparation method of 1-acetoxy-4-chloro-3-methyl-2-butene

The invention provides a preparation method of 1-acetoxy-4-chloro-3-methyl-2-butene. The preparation method comprises the following steps: carrying out a chlorohydrination reaction on isoprene and a chlorine-containing compound, carrying out an esterification reaction on a reaction product and acetic anhydride, and finally, carrying out after-treatment to obtain 1-acetoxy-4-chloro-3-methyl-2-butene. The preparation method has the advantages of mild reaction conditions, high safety, less side reactions generated in the preparation process, improvement of an overall reaction rate through usage of strong acid supported resin as a catalyst, and effective improvement of the purity and the yield of the product; and the chlorine-containing compound and the catalyst in the preparation method are convenient to recycle and reuse, so preparation cost is reduced, industrial amplification feasibility is high, and the production concept of green chemical engineering is met.

Preparation method of 1-halogenated-2-methyl-4-substituted carbonyloxy-2-butene

The invention provides a preparation method of 1-halogenated-2-methyl-4-substituted carbonyloxy-2-butene. According to the method, 2-methyl-4-hydroxy-1-butene and an acylation reagent are subjected toan acylation reaction under the action of a catalyst to prepare 2-methyl-4-substituted carbonyloxy-1-butene, and then the 2-methyl-4-substituted carbonyloxy-1-butene and halogen are subjected to an addition reaction and an alkali elimination reaction to prepare 1-halogenated-2-methyl-4-substituted carbonyloxy-2-butene. The method has the advantages of cheap and accessible raw materials and low product cost; the process flow is simple and convenient, the reaction conditions are easy to realize, the operation is safe, simple and convenient, the wastewater yield is low, and the method is green and environment-friendly; and the method also has the advantages of stable reaction intermediate product, proper reaction activity, high reaction selectivity, few side reactions and high target productyield and purity, and is suitable for green industrial production.

Method for preparing 4-acetoxy-2-methyl-2-butenal

The invention provides a method for preparing 4-acetoxy-2-methyl-2-butenal. The method comprises the following steps: esterifying isopentenol to generate isopentenol acetate; and carrying out illumination oxidation on the isopentenol acetate in the presence of a photosensitizer to generate 4-acetoxy-2-methyl-2-butenal. The method has the advantages of cheap and easily available starting raw material isopentenol, high atom economy of the process route, no use of precious metals, less three wastes, and economic and effective synthesis route.

A process for preparing 4 - acetoxy -2 - methyl -2 - butenal new method

The present invention provides a process for preparing 4 - acetoxy - 2 - methyl - 2 - butenal new method. Comprises the following steps: 1, fed with methanol reaction to generate acetal thing (I); 2, acetal thing (I) under the catalysis of the copper salt with the peroxide tert-butyl acetate is generated by the reaction (II) shrinks the aldehydo-ester; 3, shrinks the aldehydo-ester (II) hydrolyzed under acidic conditions to obtain 4 - acetoxy - 2 - methyl - 2 - butenal. The method of starting material fed in cheap and easy to obtain, the process route is short, three wastes, synthetic route economic and effective.

Preparation method of 4-acetoxy-2-methyl-2-crotonaldehyde

The invention provides a preparation method of 4-acetoxy-2-methyl-2-crotonaldehyde. The preparation method comprises the following steps that (1) prenyl chloride is oxidized with oxygen under the effect of a catalyst into 4-chloro-2-methyl-2-crotonaldehyde; and 2) 4-chloro-2-methyl-2-crotonaldehyde and acetate are reacted to obtain 4-acetoxy-2-methyl-2-crotonaldehyde. The method is cheap and available in prenyl chloride as a starting material and short in process route as well as is economic and effective.

Preparation method of 4-acetyloxy2-methyl-2-butenal

The invention discloses a preparation method of 4-acetyloxy2-methyl-2-butenal. The method includes following steps: (1), feeding isoprene and Cl2 into an organic solvent containing a catalyst 1 and apolymerization inhibitor for addition reaction to obtain reaction liquid containing 1, 4-dichlorinated olefin; (2), enabling dichlorinated olefin obtained in the step (1) to react with an acetylationreagent under action of an acid binding agent, a cocatalyst and a catalyst 2 to obtain chlorinated olefin aldehyde alcohol ester; (3), allowing a product obtained in the step (2) to react with hexamethylenetetramine to generate 4-acetyloxy2-methyl-2-butenal. Isoprene and chlorine are used as starting raw materials, are common chemical raw materials and are low in cost and easy to obtain, and noblemetal catalysts are not needed, so that the preparation method is low in cost, simple to operate and little in environment pollution and is an effective synthetic route.

METHOD OF MANUFACTURING 1-CHLORO-2-METHYL-4-ACYLOXY-2-BUTENE DERIVATIVES

1-Chloro-2-methyl-4-acyloxy-2-butene derivatives can be synthesized in good yields and high purity starting from isoprene and employing a chlorohydrin formation reaction in a system made of N-chloroisocyanuric acid derivatives and water, followed by esterification and rearrangement of the crude product mixture.

New retinoid analogs from δ-pyronene, a natural synthon

δ-Pyronene (1), a readily available terpenic synthon, is an excellent raw material for the preparation of numerous terpenic intermediates. Original retinoid analogs such as 'iso'-retinyl acetate (5), 'iso'-retinal (6) and ethyl 'iso' retinoate (7), in which the cyclogeranyl moiety is functionalized in an unusual position, were prepared from δ-pyronene.