A process for preparing a ketone of the general formula:
in which R¹ and R² each independantly represent a C₁₋₆ alkyl or C₆₋₁₂ aryl group, and R represents an alkyl, aryl, aralkyl, heterocyclic or carboxylic group, which process comprises reacting a carboxylic acid having the general formula I in which R represents a hydroxy group with a lithium compound to form the corresponding lithium salt of the carboxylic acid;
reacting the lithium salt so-obtained with thionyl chloride to yield an acyl chloride having the general formula I in which R represents a chlorine atom;
reacting the acyl chloride so-obtained with a secondary amine to yield an amide having general formula I in which R represents a secondary amino group; and
reacting the amide so-obtained with an organometallic reagent to yield the ketone having general formula I.
一种通式酮的制备方法:
其中 R¹ 和 R² 各自独立地代表 C₁₋₆ 烷基或 C₆₋₁₂ 芳基,R 代表烷基、芳基、芳烷基、杂环基或羧基、该工艺包括将通式 I 中 R 代表羟基的
羧酸与
锂化合物反应,生成相应的
羧酸锂盐;
将得到的
锂盐与亚
硫酰氯反应,生成具有通式 I 的酰基
氯,其中 R 代表
氯原子;
将得到的酰基
氯与仲胺反应,生成通式 I 中 R 代表仲
氨基的酰胺;以及
将得到的酰胺与有机
金属试剂反应,得到通式 I 的酮。