The Synthesis of 2,5-Dialkylcyclopentanones from Aliphatic Aldehydes and Formaldehyde
作者:Yoshihisa Watanabe、Fukashi Sakamoto、Sang Chul Shim、Take-aki Mitsudo
DOI:10.1246/bcsj.54.3875
日期:1981.12
Aliphatic aldehydes react with formaldehyde in the presence of dimethylamine hydrochloride at 200 °C to form 2,5-dialkylcyclopentanones in moderate yields. Propanal, butanal, and pentanal give 2,5-dimethyl-, 2,5-diethyl-, and 2,5-dipropylcyclopentanone respectively, but ethanal gives only a tarry material.
脂肪醛与甲醛在盐酸二甲胺存在下于 200 °C 发生反应,生成 2,5-二烷基环戊酮,产率中等。丙醛、丁醛和戊醛分别生成 2,5-二甲基环戊酮、2,5-二乙基环戊酮和 2,5-二丙基环戊酮,但乙醛只生成焦油状物质。