Ethylcyclopentane-1,3-dione

Starting material of the synthesis is 6-methoxy-l-tetralone, which is first reacted with vinylmagnesium chloride to give the corresponding vinyl alcohol. Condensation with 2-ethylcyclopentane- 1,3-dione imder basic or acidic catalysis (p-TsOH, benzene, 82 %) [54] leads, accordingtoTorgov [55], to aseco-dione, which is then reduced with Saccharomyces uvarum to the yS-hydroxy-ketone. [56]... 

Condensation of the vinyl alcohol (54) with 2-ethylcyclopentane-l,3-dione je j to the expected product from which B-noroestradiol was ultimately obtained.19 Of particular conformational interest is that the double bond in one of the intermediates (55) was not isomerized by acid to the A9(11)-position despite the fact that the compound is a trans-hydrindane. The compound (56), prepared from m-methoxyphenylethylmagnesium bromide and the corresponding cis-hydrindanedione, undergoes dehydration but not cyclization on treatment with... 

D.69) 2-Cyclopenten-l-one, 3-ethyl-2-hydroxy-, 3-ethyl-2-hydroxycyclopent-2-en-l-one, 3-ethylcyclopenten-2-en-2-ol-l-one [21835-01-8] 1,2-cyclopentanedione, 3-ethyl-, 3-ethylcyclopentane-l, 2-dione [13494-08-1]... 

Hazardous Decomp. Prods. Heated to decomp., emits acrid smoke and fumes NFPA Health 1, Flammability 3, Reactivity 0 Storage Store in cool, dry, well-ventilated area out of direct sunlight, away from heat, sparks, open flame, other ignition sources keep tightly closed Uses Extraction solvent for essential oils org. synthesis component in gasoline Manuf./Distrib. Aldrich http //www.sigma-aldrich.com, ICN Biomed. Research Prods. http //www.icnbiomed.com, TCI Am. http //www.tciamerica. com 3-Ethylcyclopentane-1,2-dione CAS 13494-08-1 EINECS/ELINCS 236-812-9 Uses Fragrance in cosmetics Ethyl decadienoate... 

Ethylcyclopentane-1,2-dione Ethyl decadienoate Ethyl decanoate 4-Ethyl-a,a-dimethyl benzenepropanal Ethyl ethyl hexanoate... 

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