反応 #2254219

反応方程式

PPh3

1-[9-(prop-2-en-1-yl)-6-oxaspiro[4.5]decan-9-yl]-1H-pyrazole

O3

→

2-[9-(1H-pyrazol-1-yl)-6-oxaspiro[4.5]decan-9-yl]acetaldehyde

収率 23.0%

溶媒

DCM

反応条件

後処理

1. 1
   その他The resulting solution was bubbled with N2 for 5 min
2. 2
   その他After removal of the solvent
3. 3
   その他the residue was purified by flash column chromatography

実験手順

To a solution of 1-[9-(prop-2-en-1-yl)-6-oxaspiro[4.5]decan-9-yl]-1H-pyrazole (80 mg, 0.32 mmol) in DCM (5 mL) at −78° C. was bubbled with O3 until the solution turned blue. The resulting solution was bubbled with N2 for 5 min. To it was added PPh3 (168 mg, 0.64 mmol). And the solution was stirred for 4 h at rt. After removal of the solvent, the residue was purified by flash column chromatography to give 2-[9-(1H-pyrazol-1-yl)-6-oxaspiro[4.5]decan-9-yl]acetaldehyde (15 mg, 23% yield). LCMS m/z 249 (M+1) observed.

出典