反応 #806249

反応方程式

ammonium chloride

methyl 7-oxa-2-norbornanecarboxylate

magnesium

1,4-dibromobutane

→

1-(7-oxanorbornan-2-yl)cyclopentanol

収率 96.0%

溶媒

tetrahydrofuran

反応条件

後処理

1. 1
   workup.ADDITIONwas added dropwise at 50° C
2. 2
   workup.ADDITIONAfter the completion of dropwise addition
3. 3
   workup.STIRRINGThe solution was stirred at room temperature for one hour

実験手順

A flask was charged with 14.6 g of magnesium and 270 ml of tetrahydrofuran, to which 64.8 g of 1,4-dibromobutane was added dropwise at 50° C. After the completion of dropwise addition, the solution was stirred at 60° C. for one hour. To the solution below 40° C., 39.0 g of methyl 7-oxa-2-norbornanecarboxylate was added dropwise. The solution was stirred at room temperature for one hour, after which an aqueous solution of ammonium chloride was added for hydrolysis. Ordinary post-treatment yielded 43.7 g of 1-(7-oxanorbornan-2-yl)cyclopentanol.

出典