2,3,4,5-Tetramethyl-2-cyclopentenone

• CAT Number: L038582
• CAS Number: 54458-61-6
• Molecular Formula: C9H14O
• Molecular Weight: 138.21
• Purity: ≥95%
• IUPAC Name: 2,3,4,5-tetramethylcyclopent-2-en-1-one
• InChI: InChI=1S/C9H14O/c1-5-6(2)8(4)9(10)7(5)3/h5,7H,1-4H3
• InChIKey: ARUAYSANQMCCEN-UHFFFAOYSA-N
• SMILES: CC1C(C(=O)C(=C1C)C)C

2,3,4,5-Tetramethyl-2-cyclopentenone（Cat No.:L038582）is a highly substituted cyclopentenone featuring four methyl groups at positions 2 through 5 and a conjugated ketone at the 2-position. This compound exhibits significant steric hindrance and electron-donating character due to the methyl substituents, enhancing its reactivity in cycloaddition, Michael addition, and enolate chemistry. It is commonly used as an intermediate in the synthesis of complex natural products, pharmaceuticals, and fragrance molecules. The enone system supports nucleophilic and electrophilic attack, while the rigid five-membered ring contributes to defined stereochemical outcomes in asymmetric synthesis.