2,3-Dimethylthiophene

Base Information

• Chemical Name: 2,3-Dimethylthiophene
• CAS No.: 632-16-6
• Molecular Formula: C6H8S
• Molecular Weight: 112.196
• Hs Code.: 29349990
• European Community (EC) Number: 211-170-2
• UNII: VJY61TQ8W6
• DSSTox Substance ID: DTXSID50212550
• Nikkaji Number: J110.440C
• Wikidata: Q72472233
• Metabolomics Workbench ID: 45826
• Mol file: 632-16-6.mol

Synonyms:Thiophene, 2,3-dimethyl-;thioxene;Dimethylthiopene;Thiophene, dimethyl-;

Chemical Property of 2,3-Dimethylthiophene

Chemical Property:

• Appearance/Colour: clear colorless to yellow liquid
• Vapor Pressure: 6.37mmHg at 25°C
• Melting Point: -49oC
• Refractive Index: 1.517-1.521
• Boiling Point: 144.6 °C at 760 mmHg
• Flash Point: 25.8 °C
• PSA: 28.24000
• Density: 1.006 g/cm³
• LogP: 2.36490
• Storage Temp.: Flammables area
• Solubility.: Chloroform, Methanol (Slightly)
• Water Solubility.: Insoluble in water.
• XLogP3: 2.4
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 1
• Rotatable Bond Count: 0
• Exact Mass: 112.03467143
• Heavy Atom Count: 7
• Complexity: 61.2

Purity/Quality:

98%, ^*data from raw suppliers

2,3-Dimethylthiophene ^*data from reagent suppliers

Safty Information:

• Pictogram(s): XnF
• Hazard Codes: Xn-F,Xi,Xn,F
• Statements: 20/21/22-11-36/37/38
• Safety Statements: 9-36/37-33-16-26

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: CC1=C(SC=C1)C
• Uses: It has also been found that 2,3-dimethylthiophene can be formylated to yield a dimethylthiophene aldehyde, which as expected proved to have the aldehyde group in the free a-position.

Technology Process of 2,3-Dimethylthiophene

There total 26 articles about 2,3-Dimethylthiophene which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 96.0%

→ 2,3-dimethylthiophene (632-16-6)

Guidance literature:

In diethyl ether; sunlight;

Reference yield: 89.0%

3-methyl-2-thiophenecarboxaldehdye (5834-16-2,699531-50-5) → 2,3-dimethylthiophene (632-16-6)

Guidance literature:

With potassium hydroxide; hydrazine hydrate; In diethylene glycol;

Reference yield: 77.0%

methyl (E)-2-((3-methylthiophen-2-yl)methylene)hydrazine-1-carboxylate → 2,3-dimethylthiophene (632-16-6)

Guidance literature:

With potassium hydroxide; In 2,2'-[1,2-ethanediylbis(oxy)]bisethanol; at 140 ℃; for 4h;

DOI:10.1055/s-0035-1560805

upstream raw materials:

3-methyl-2-thiophenecarboxaldehdye

3-methyl-thiophene-2-carbaldehyde semicarbazone

3-methyllevulinic acid

2-Methylthiophene

Downstream raw materials:

(4,5-dimethyl-2-thienyl)(methyl)methanone

4,5-dimethylthiophene-2-carboxaldehyde

4,5-dimethyl-thiophene-2-carboxylic acid

2,3-dimethyl-5-thiophenesulfonamide

Refernces

• 1、 Cranwell, Philippa B.,Russell, Andrew T.,Smith, Christopher D.. "Methyl Hydrazinocarboxylate as a Practical Alternative to Hydrazine in the Wolff-Kishner Reaction". . p. 131 - 135. Retrieved 2015/12/26.
• 2、 Smith, Keith,Barratt, Mark Lewis. "Highly selective 5-substitution of 3-methylthiophene via directed lithiation". . p. 1031 - 1034. Retrieved 2008/02/04.