90049-64-2

Basic information

• Product Name: 1-Cyclopentene-1-carboxaldehyde, 3-methyl- (7CI,9CI)
• Synonyms: 1-Cyclopentene-1-carboxaldehyde, 3-methyl- (7CI,9CI)
• CAS NO: 90049-64-2
• Molecular Formula: C₇H₁₀O
• Molecular Weight: 110.1537
• Product Categories: ACIDHALIDE
• Mol File: 90049-64-2.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1-Cyclopentene-1-carboxaldehyde, 3-methyl- (7CI,9CI)(CAS DataBase Reference)
• NIST Chemistry Reference: 1-Cyclopentene-1-carboxaldehyde, 3-methyl- (7CI,9CI)(90049-64-2)
• EPA Substance Registry System: 1-Cyclopentene-1-carboxaldehyde, 3-methyl- (7CI,9CI)(90049-64-2)

Safety Data

• Hazardous Substances Data: 90049-64-2(Hazardous Substances Data)

Upstream product

• 23477-91-0 3-methyl-(1R,2R)-cyclohexanediol 
• 488-17-5 3-methylbenzene-1,2-diol 

Downstream Products

• 108585-68-8 (E)-3-(Dimethyl-phenyl-silanyl)-1-(3-methyl-cyclopent-1-enyl)-prop-2-en-1-ol 
• 108585-69-9 (E)-1-(3-Methyl-cyclopent-1-enyl)-3-(methyl-diphenyl-silanyl)-prop-2-en-1-ol 
• 108585-70-2 (E)-1-(3-Methyl-cyclopent-1-enyl)-3-triphenylsilanyl-prop-2-en-1-ol 
• 108585-75-7 E-1-(3'-methyl-1'-cyclopentenyl)-3-dimethylphenylsilyl-2-propen-1-one 
• 108585-76-8 E-1-(3'-methyl-1'-cyclopentenyl)-3-diphenylmethylsilyl-2-propen-1-one 
• 108585-77-9 E-1-(3'-methyl-1'-cyclopentenyl)-3-triphenylsilyl-2-propen-1-one 

Relevant articles and documents

Bicyclooctenones in Synthesis. A New Synthesis of (+/-)-Cedrene using Sequential Inter- and Intra-molecular Michael Reactions

A new synthetic approach to cedrene (1) based on sequential inter- and intra-molecular Michael reactions using the bicyclooctenone (21) as the key intermediate is described.Michael addition of the enolate derived from (21) to 2-nitrobut-2-ene, led to a mixture of diastereoisomers of the nitro ketone (22), which was then converted into the 1,4-dione (23).Treatment of (23) with potassium t-butoxide in t-butyl alcohol resulted in smooth intramolecular Michael reaction leading to a mixture of α- (24a; major) and β-isomers of the tricyclo1,5>undecanedione (24) in a combined yield of 73percent.The undecanedione (24) was then converted into (+/-)-cedrene (1) and the corresponding methyl epimer (31a) via the intermediates (25), (26), (27), and (28).