An economical process for producing (2- and/or 1-)cyclohexenyl methyl ketones which are intermediates for the synthesis of &agr;- or &bgr;-damascone. In the presence of a catalyst, a 3-cyclohexenyl methyl ketone represented by the following formula (1a):
1
wherein, R
1
, R
2
and R
3
each independently represents a hydrogen atom or a methyl group and at least two of R
1
, R
2
and R
3
are methyl groups, is isomerized.
一种经济的生产(2-和/或1-)
环己烯基甲酮的过程,这些是合成α-或β-达马酮的中间体。在存在催化剂的情况下,通过以下式(1a)表示的3-
环己烯基甲酮进行异构化,其中,R1、R2和R3分别独立地表示氢原子或甲基基团,且至少有两个R1、R2和R3是甲基基团。