反応 #2061

反応方程式

2-[2,4-dichloro-5-(2-propynyloxy)phenyl]-2,4-dihydro-5-(3-butenyl)-3H-1,2,4-triazol-3-one

sodium periodate

→

title product

収率 92.2%

2-[2,4-dichloro-5-(2-propynyloxy)phenyl]-2,4-dihydro-5-(3-oxo-propyl)-3H-1,2,4-triazol-3-one

収率 92.2%

溶媒

water

tetrahydrofuran

water

反応条件

後処理

1. 1
   抽出extracted with ethyl acetate
2. 2
   乾燥The organic layer was dried (MgSO4)
3. 3
   濃縮concentrated in vacuo
4. 4
   その他The crude product was purified by flash chromatography over silica gel
5. 5
   洗浄eluting with a 96:4 v
6. 6
   workup.ADDITIONv mixture of dichloromethane and methanol

実験手順

To a solution of 500 mg (1.48 mmol) of 2-[2,4-dichloro-5-(2-propynyloxy)phenyl]-2,4-dihydro-5-(3-butenyl)-3H-1,2,4-triazol-3-one in a mixture of 10 mL of tetrahydrofuran and 10 mL of water was added 696 mg (3.25 mmol) of sodium periodate and 167 mL of 0.18M aqueous solution of osmium tetroxide at room temperature. The mixture was stirred at the room temperature for 2h, and then diluted with water and extracted with ethyl acetate. The organic layer was dried (MgSO4) and concentrated in vacuo. The crude product was purified by flash chromatography over silica gel, eluting with a 96:4 v:v mixture of dichloromethane and methanol to give 464 mg of the title product of Step 1 as a white foam. 1H NMR (CDCI3, 400 MHz) δ 11.5 (broad s,1H), 9.8 (s,1H), 7.55 (s,1H), 7.2 (s,1H), 4.8 (s,2H), 2.9 (m,4H).

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