Novel process for the production of 4,6-dimethyl-7-hydroxynonan-3-one
申请人:Philip Morris Incorporated
公开号:US04925985A1
公开(公告)日:1990-05-15
A process for the production of 4,6-dimethyl-7-hydroxynonan-3-one of specific stereochemistry is disclosed. The process results in an active (+)-serricornin.
Process for the preparation of 5-oxohexane nitriles and the compound 2,4-dimethyl-5-oxohexane nitrile
申请人:DSM N.V.
公开号:EP0437290A1
公开(公告)日:1991-07-17
The invention relates to a process for the preparation of 5-oxohexane nitriles according to Formula 1,
where at least R₁ or R₂ is an electron-donating group and at least one of the groups R₃, R₄ or R₅ is not hydrogen, by catalylic conversion of a methyl ketone according to Formula 2
where R₁ and R₂ denote the same as in Formula 1, and an α-β unsaturated nitrile according to Formula 3
in the presence of a strong base as a catalyst.
The invention furthermore relates to the new substance 2,4-dimethyl-5-oxohexane nitrile.
The obtained 5-oxohexane nitriles can be advantageously used in the preparation of 2-methylpyridines.