2,3,4,5-Tetramethyl-2-cyclopentenone (mixture of cis- and trans- isomers),

Name	2,3,4,5-tetramethyl-2-cyclopentanone (cis+trans)
Synonyms	2,3,4,5-TETRAMETHYLCYCLOPENT-2-ENONE 2,3,4,5-Tetramethyl-2-cyclopentenone 2,3,4,5-TETRAMETHYL-2-CYCLOPENTENONE 2,3,4,5-TETRAMETHYL-2-CYCLOPENTEN-1-ONE 2,3,4,5-tetramethylcyclopent-2-en-1-one (4S,5S)-2,3,4,5-tetramethylcyclopent-2-en-1-one (4R,5R)-2,3,4,5-tetramethylcyclopent-2-en-1-one (4R,5S)-2,3,4,5-tetramethylcyclopent-2-en-1-one (4S,5R)-2,3,4,5-tetramethylcyclopent-2-en-1-one 2,3,4,5-tetramethyl-2-cyclopentanone (cis+trans) 2,3,4,5-tetramethyl-2-cyclopentenone, cis + trans 2,3,4,5-tetramethyl-2-cyclopentenone, mixture of cis and trans 2,3,4,5-Tetramethyl-2-cyclopentenone (mixture of cis- and trans- isomers),
CAS	54458-61-6
EINECS	611-148-6
InChI	InChI=1/C9H14O/c1-5-6(2)8(4)9(10)7(5)3/h5,7H,1-4H3/t5-,7-/m0/s1
InChIKey	ARUAYSANQMCCEN-UHFFFAOYSA-N

Molecular Formula	C9H14O
Molar Mass	138.21
Density	0.927g/mLat 20°C(lit.)
Boling Point	100°C30mm Hg(lit.)
Flash Point	164°F
Water Solubility	Not miscible with water.
Solubility	Chloroform, Methanol
Vapor Presure	0.406mmHg at 25°C
Appearance	Oil
Specific Gravity	0.917
Color	Clear Colourless
BRN	2324088
Storage Condition	Keep in dark place,Sealed in dry,Room Temperature
Refractive Index	n20/D 1.476
MDL	MFCD00010248

Safety Description	S23 - Do not breathe vapour. S24/25 - Avoid contact with skin and eyes. S35 - This material and its container must be disposed of in a safe way. S3/9/49 - S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S36 - Wear suitable protective clothing. S15 - Keep away from heat.
WGK Germany	3
HS Code	29142990

Application	2,3,4,5-tetramethyl-2-cyclopentenone is an important pharmaceutical intermediate that can be used as a functional material intermediate. It can be prepared by the reaction of ketone with trichloropropoxytitanium and acetaldehyde.
Preparation	2,3,4, 5-tetramethyl-2-cyclopentenone synthesis: In a round-bottom flask equipped with a mechanical stirrer, 200g(23.2mol) of the starting ketone is added to the dropping funnel and reflux condenser, of which 75% w/w butyl acetate is the solvent, 0.35 molar equivalent of anhydrous magnesium chloride and titanium containing 0.06 molar equivalent of trichloropropoxy titanium complex are catalytic solutions. The resulting suspension was agitated vigorously and heated to 90°C. Then 2 molar equivalents of acetaldehyde were added dropwise within 3 hours at 90°C. The reaction continued for another hour and cooled to 40°C. The reaction mixture was hydrolyzed with an aqueous solution of 10% acetic acid and neutralized with an aqueous solution of 20% potassium carbonate. The resulting organic phase was fractionated directly into a Sulzer packed column in the laboratory to obtain 2,3,4, 5-tetramethyl-2-cyclopentenone.
use	functional material intermediate

Last Update：2024-04-09 20:49:11

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2,3,4,5-Tetramethyl-2-cyclopentenone (mixture of cis- and trans- isomers), Request for Quotation