PROCEDE POUR LA PREPARATION DE LA 3,11-DIMETHYL-2-NONACOSANONE

PROCEDE POUR LA PREPARATION DE LA 3,11-DIMETHYL-2-NONACOSANONE

The compound of the formula /I/ is prepared by a./reacting a 2,10-dimethyloctacosanoic acid ester of the general formula /II/, wherein R is a C1-5 alkyl group, with a trialkylsilylmethyl lithium in an ether-type solvent, reacting the intermediate of the general formula /III/ thus obtained, wherein R...

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Bibliographische Detailangaben
1. Verfasser: CSABA SZANTAY, LAJOS NOVAK, GABOR BAAN, ANDRAS DANCSO, ATTILA KIS-TAMAS ET FERENC JURAK
Format: Patent
Sprache:fre
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:The compound of the formula /I/ is prepared by a./reacting a 2,10-dimethyloctacosanoic acid ester of the general formula /II/, wherein R is a C1-5 alkyl group, with a trialkylsilylmethyl lithium in an ether-type solvent, reacting the intermediate of the general formula /III/ thus obtained, wherein R , R and R may be the same or different and represent a C1-5 alkyl group with an aliphatic alcohol; or b./reacting a 2,10-dimethyloctacosanoic acid ester of the general formula /II/with a solution of methylsulfinylmethyde in dimethylsulfoxide in an ether-type solvent, reacting the compound thus obtained with a reducing agent, e.g. aluminium amalgam, and separating the compound of the formula /I/thus obtained from the reaction mixture. The 3,11-dimethyl-2-nonacosanone of the formula /I/ produces a strong stimulating reaction on male German cockroach /Blattella Germanica/. Compounds of formula (II) are novel.