6672-40-8

Upstream product

• 931-22-6 3,5-dimethyl-2-cyclopenten-1-one 
• 1120-72-5 2-Methylcyclopentanone 
• 74-88-4 methyl iodide 
• 14963-40-7 5-methylcyclopent-2-en-1-one 
• 7214-50-8 5-methylcyclohex-2-en-1-one 
• 17946-71-3 lithium trimethylstannyl 
• 871884-38-7 1-hydroxy-2,4-dimethyl-cyclopentanecarboxylic acid 
• 128946-89-4 (+)-(1Ξ,4R)-4-methyl-2-oxo-cyclopentanecarboxylic acid methyl ester 
• 2748-11-0 3,5-dimethyl-cyclohexane-1,2-dione 

Downstream Products

• 74421-27-5 2,4-Dimethyl-1-phenylcyclopentane 
• 104262-24-0 2,4-Dimethyl-1-p-tolylcyclopentane 
• 690224-56-7 4a,6-dimethyl-octahydro-[1]pyrindine 
• 132142-78-0 (2R,3R)-2-(1-Benzenesulfonyl-1H-pyrrol-2-yl)-1-[2-(dimethyl-hydrazono)-butyl]-3,5-dimethyl-cyclopentanol 
• 132142-77-9 1-[(4S,5R)-5-(1-Benzenesulfonyl-1H-pyrrol-2-yl)-2,4-dimethyl-cyclopent-1-enyl]-butan-2-one 
• 132142-68-8 3,5-dimethyl-2-(1-phenylsulfonyl-2-pyrrolyl)cyclopentanone 
• 132142-70-2 (2R,3R)-2-(1-Benzenesulfonyl-1H-pyrrol-2-yl)-1-[2-(dimethyl-hydrazono)-hex-5-enyl]-3,5-dimethyl-cyclopentanol 
• 132142-86-0 2-[(2R,3R)-2-(1-Benzenesulfonyl-1H-pyrrol-2-yl)-1-hydroxy-3,5-dimethyl-cyclopentyl]-hex-5-enal 
• 132142-82-6 1-[(4S,5R)-5-(1-Benzenesulfonyl-1H-pyrrol-2-yl)-2,4-dimethyl-cyclopent-1-enyl]-hex-5-en-2-one 
• 132142-80-4 1-[(4S,5R)-5-(1-Benzenesulfonyl-1H-pyrrol-2-yl)-2,4-dimethyl-cyclopent-1-enyl]-hexan-2-one 
• 132142-75-7 3,5-dimethyl-2-(1-phenylsulfonyl-2-pyrrolyl)cyclopentanone ethylene acetal 
• 104550-67-6 1-ethynyl-2,4-dimethyl-cyclopentanol 
• 99182-92-0 1-(1-hydroxy-2,4-dimethyl-cyclopentyl)-ethanone 

Relevant academic research and scientific papers

Regioselective synthesis of 2,2-dimethylcyclopentanone using 2-pyrrolidone magnesium salt as electrogenerated base

An efficient, direct and regioselective preparation of 2,2-dimethylcyclopentanone, via its enolate precursor regioselectively obtained using the 2-pyrrolidone magnesium salt, a base electrogenerated in DME/HMPA, is reported.

Chemo- and Stereo-selective Preparation of Cyclopentanone Derivatives from Cyclohexenones using Trimethylstannyl-lithium as a Key Reagent

Upon treatment with trimethylsilyl trifluoromethane-sulphonate, β-stannylcyclohexanones afforded cyclopentanones chemo- and stereo-selectively.

DETERMINATION OF THE ABSOLUTE STRUCTURES OF CIS-TRIKENTRIN A AND TRANS-TRIKENTRIN A BY SYNTHESIS OF THEIR ENANTIOMERS

(-)-cis-Trikentrin A (20) and (-)-trans-trikentrin A (21) were synthesized from (R)-3-methyladipic acid by way of pyrrole derivatives 14, 15, and 17, establishing the absolute structure of the natural cis- and trans-trikentrins A to be 1 and 2.

REGIO AND STEREOSELECTIVE PREPARATION OF SUBSTITUTED CYCLOPENTANONES FROM CYCLOHEXENONES UTILIZING TRIMETHYLSTANNYLLITHIUM AS A KEY REAGENT

3-Stannylcyclohexanones gave cyclopentanones via carbon-skeleton rearrangement with high regio and stereoselectivity, upon treatment with trimethylsilyl trifluoromethanesulfonate.

CUPRATE ADDITIONS TO 5-METHOXYCYCLOPENTENONES: A NOVEL STEREOELECTRONIC EFFECT

Cuprate additions to 5-methoxy-2-cyclopentenone have been found to proceed with moderate to extremely high diastereofacial selectivity, depending upon the specific cuprate and reaction protocol employed.Comparisons with related 5-substitued cyclopentenones suggest that the observed selectivity is not simply steric in nature, but instead reflects a novel stereoelectronic effect.