Provided is a method with which an α-allylated cycloalkanone is obtained from a cyclic compound cycloalkanone used as a starting material. The method is a method for producing an α-allylated cycloalkanone represented by General Formula (III), and the method includes: a step 1: reacting a compound represented by General Formula (I) and alcohol having 1 or more and 4 or less of carbon atoms in the presence of a first acid catalyst and optionally a dehydrating agent; and a step 2: reacting a crude product obtained in the step 1 and a compound represented by General Formula (II) in the presence of a second acid catalyst to produce an α-allylated cycloalkanone represented by General Formula (III). The step 1 and the step 2 are consecutively performed. In the formulae above, the group -A
1
- (it should be noted that the front bond refers to a bond that binds to the carbon atom C
1
and the back bond refers to a bond that binds to the carbon atom C
2
) is an alkylene group having 4 or more and 20 or less of carbon atoms that optionally contains a hetero atom and optionally has a substituent, and R
4
is a hydrogen atom or an alkyl group having 1 or more and 4 or less of carbon atoms.
本发明提供了一种从用作起始原料的环状化合物环烷酮中获得α-烯丙基环烷酮的方法。该方法是一种生产通式(III)代表的 α-烯丙基环烷酮的方法,该方法包括: 步骤 1:在第一酸催化剂和可选的脱
水剂存在下,使通式(I)代表的化合物和具有 1 个或 1 个以上和 4 个或 4 个以下碳原子的醇反应;以及 步骤 2:在第二酸催化剂存在下,使步骤 1 中得到的粗产物和通式(II)代表的化合物反应,生成通式(III)代表的 α-烯丙基环烷酮。步骤 1 和步骤 2 连续进行。在上式中,基团 -A
1
- 应注意,前键是指与碳原子 C
1
的键,后键指与碳原子 C
2
)是一个碳原子数为 4 个或 4 个以上、20 个或 20 个以下的亚烷基,该亚烷基可选择含有一个杂原子,并可选择具有一个取代基,且 R
4
是氢原子或具有 1 个或 1 个以上、4 个或 4 个以下碳原子的烷基。