反応 #2254214

反応方程式

DIBAL

2-[(9R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]decan-9-yl]acetonitrile

MeOH

water

→

2-[(9R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]decan-9-yl]acetaldehyde

収率 80.0%

溶媒

toluene

toluene

反応条件

後処理

1. 1
   workup.STIRRINGstir
2. 2
   温度while warming
3. 3
   workup.ADDITION175 mg NA2SO4 added
4. 4
   workup.STIRRINGstir at room temp

実験手順

1.0 M DIBAL solution in toluene (3.0 ml, 3 mmol) was added drop-wise to a solution of 2-[(9R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]decan-9-yl]acetonitrile (350 mg, 1.4 mmol) in 7 mL toluene at −78° C. The resulting mixture was stirred at −78° C. until completion (1.5 h). The reaction was then quenched with 5 eq of MeOH (0.28 mL) and 0.1 mL water, stir while warming, 175 mg NA2SO4 added, stir at room temp. 2 h to give 310 mg (80%) of 2-[(9R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]decan-9-yl]acetaldehyde. LCMS m/z 250.6 (M+1) observed.

出典