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.
本发明涉及一种根据式 1 制备 5-氧代己烷腈的工艺、
其中至少 R₁ 或 R₂ 是电子奉献基团,且至少一个基团 R₃、R₄ 或 R₅ 不是氢,通过催化转化根据式 2 的甲基酮来制备
其中 R₁ 和 R₂ 表示与式 1 相同,以及根据式 3 的 α-β 不饱和腈
在强碱作为催化剂的存在下。
本发明还涉及一种新物质 2,4-二甲基-5-氧代己烷腈。
所得到的 5-氧代己烷腈可用于制备 2-甲基吡啶。