反応 #5365

反応方程式

Cis-nonen-1-ol

sodium bicarbonate

sodium bromide

→

cis-2-(2'-pentylcyclopropyl)acetic acid

溶媒

dichloromethane

NaOCl

water

反応条件

後処理

1. 1
   その他as described in the preparation of Example 52
2. 2
   workup.ADDITIONTo this mixture is added 1.50 g of Aliquot 336
3. 3
   その他separated from the organic phase
4. 4
   抽出extracted three times with dichloromethane
5. 5
   洗浄The combined organic layers are washed with water
6. 6
   乾燥dried over MgSO4
7. 7
   濃縮concentrated in vacuo

実験手順

Cis-nonen-1-ol (10.0 g) is subjected to the cyclopropanation conditions as described in the preparation of Example 52. The resulting residue is taken up in 100 mL of dichloromethane at 0° C., followed by the addition of 800 mg of sodium bromide in 2 mL of water and 150 mg of 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical. To this mixture is added 1.50 g of Aliquot 336 followed by the dropwise addition of 9.2 g of sodium bicarbonate in 230 mL of 5% NaOCl. The aqueous phase is made basic, separated from the organic phase and acidified with concentrated HCl, and then extracted three times with dichloromethane. The combined organic layers are washed with water, dried over MgSO4, and concentrated in vacuo to give cis-2-(2'-pentylcyclopropyl)acetic acid.

出典