反応 #57070

反応方程式

triethylamine hydrochloride

THF

sodium acetate

→

2

(1R*,2R*)-Acetic acid 1-hydroxy-1,2-dihydro-naphthalen-2-yl-ester

反応条件

後処理

1. 1
   その他To a flame dried round bottom flask
2. 2
   温度The mixture was heated
3. 3
   温度at reflux for 3 hours
4. 4
   その他the solvents were removed in vacuio
5. 5
   その他The resulting mixture was purified by flash chromatography (30% ethyl acetate in hexanes)

実験手順

To a flame dried round bottom flask, [Rh(COD)Cl]2 (4.3 mg, 0.008 mmol DPPF (9.6 mg, 0.017 mmol),1 (50 mg, 1.39 mmol), and sodium acetate (142 mg, 1.74 mmol) were added followed by addition of THF (2 mL) and triethylamine hydrochloride (239 mg, 1.74 mmol). The mixture was heated at reflux for 3 hours and the solvents were removed in vacuio. The resulting mixture was purified by flash chromatography (30% ethyl acetate in hexanes) to give 2 as a crystalline solid (41 mg), 63%). Rf=0.26 on silica gel (20% ethyl acetate:hexanes); mp 67-68° (Et2O); IR (KBr, cm−1) 1H NMR (400 MHz, CDCl3) δ 7.54-7.53 (1H, m), 7.29-7.24 (2H, m), 7.10-7.08 (1H, m), 6.50 (1H, dd, J=3.9, 1.3 Hz), 5.85 (1H, dd, J=9.9, 3.1 Hz), 5.59 (1H, ddd, J=9.0, 2.8, 1.9 Hz), 4.92 (1H, d, J=9.0 Hz), 2.64 (1H, s), 2.12 (3H, s); 13C NMR (400 MHz, CDCl3) δ 171.3, 135.2, 131.5, 129.5, 128.3, 126.7, 126.0, 125.4, 75.3, 71.7, 21.2. HRMS calcd for C12H12O3 (M+): 204.0786. Found: 204.0791.

出典