Pentanal → Cyclopentanone, 2-(1-hydroxypentyl)-

Participants

Reaction Conditions

Reaction Steps

Valeraldehyde having an acid value of 7.3 mg-KOH/g was used as the starting material. 178 g (2.14 mol) cyclopentanone, 80 g water and 0.62 g (0.007 mol) 48% NaOH were introduced into a 500-mL four-necked flask, then the mixture was cooled to 15° C. under stirring, and 80.4 g (0.93 mol) valeraldehyde was added dropwise at the same temperature over 5 hours. Thereafter, the mixture was stirred at the same temperature for 3 hours. After the reaction was finished, the mixture was neutralized and analyzed in the same manner as in Example 1. The result indicated that the reaction mixture contained 62.9 g (0.37 mol) 2-(1-hydroxy-n-pentyl)cyclopentanone (yield 40.0%) and 0.55 g (0.004 mol) 2-pentylidene cyclopentanone.

Provenance & Evidence