17790-74-8

Basic information

• Product Name: ethyl 2-methyl-4-oxocyclopent-2-ene-1-carboxylate
• Synonyms: ethyl 2-methyl-4-oxocyclopent-2-ene-1-carboxylate;Ethyl 2-methyl-4-oxocyclopent-2-enecarboxylate;2-Methyl-4-oxocyclopent-2-enecarboxylic acid ethyl ester
• CAS NO: 17790-74-8
• Molecular Formula: C₉H₁₂O₃
• Molecular Weight: 168.19
• Mol File: 17790-74-8.mol
• Article Data: 4

Chemical Properties

• Appearance: /
• Storage Temp.: Sealed in dry,Room Temperature
• CAS DataBase Reference: ethyl 2-methyl-4-oxocyclopent-2-ene-1-carboxylate(CAS DataBase Reference)
• NIST Chemistry Reference: ethyl 2-methyl-4-oxocyclopent-2-ene-1-carboxylate(17790-74-8)
• EPA Substance Registry System: ethyl 2-methyl-4-oxocyclopent-2-ene-1-carboxylate(17790-74-8)

Safety Data

• Hazardous Substances Data: 17790-74-8(Hazardous Substances Data)

Upstream product

• 1830-54-2 3-oxopentanedioic acid dimethyl ester 
• 201595-00-8 ethyl 2,3-dioxopropanoate 
• 141-97-9 ethyl acetoacetate 
• 29310-37-0 3-ethoxycarbonyl-2-methylallyltriphenylphosphonium bromide 
• 128590-34-1 ethyl 4-ethylthio-2-methylcyclopenta-1,3-diene-1-carboxylate 
• 17790-69-1 2-methyl-5-oxocyclopent-1-ene-1,3-dicarboxylic acid 3-ethyl ester 1-methyl ester 

Downstream Products

• 104104-38-3 (3,4,5,5-tetramethylcyclopent-2-enyl)methanol 
• 613669-91-3 (1S,2S,4R)-4-Acetoxy-2-methyl-2-p-tolyl-cyclopentanecarboxylic acid ethyl ester 
• 613669-95-7 (+)-(1S,2S,4R)-4-hydroxy-2-methyl-2-p-tolylcyclopentanecarboxylic acid ethyl ester 
• 2758-18-1 3-Methyl-2-cyclopenten-1-one 

Relevant articles and documents

Synthesis and bioassay of racemic and chiral trans -α-Necrodyl Isobutyrate, the sex pheromone of the grape mealybug pseudococcus maritimus

A concise synthesis of the racemic form of the female-produced pheromone of the grape mealybug was developed. The synthesis was readily adapted to production of both enantiomers of the pheromone via lipase-catalyzed kinetic resolution of an intermediate in the synthesis. Replicated field trials revealed that, contrary to a preliminary report, the (R,R)- rather than the (S,S)-enantiomer is the attractive stereoisomer. Lithium aluminum hydride reduction of the insect-produced compound to α-necrodol followed by analysis on a chiral stationary phase GC column showed that the insect-produced material was actually an 85:15 mixture of the (R,R)- and (S,S)-enantiomers. The racemic form of the pheromone was highly attractive to male mealybugs, and in one of two field bioassays, the racemic material was significantly more attractive than the pure (R,R)-enantiomer, suggesting that the (S,S)-enantiomer might act synergistically.

-Annulation using Allylidene(triphenyl)phosphoranes: a One-Step Synthesis of Cyclopentadienes

A convenient method for the synthesis of substituted cyclopentadienes has been developed using allylidene(triphenyl)phosphoranes. (3-Ethoxycarbonyl-2-substituted-2-propenylidene)triphenylphosphoranes 1 reacted with α-halogenoketones under very mild condit