تفاعل #1269146

معادلة التفاعل

2-bromo-6-methoxy-4-(2-trimethylsilanyl-ethoxymethoxy)-quinoline-2-carboxylic acid methyl ester

N-methylhomopiperazine

BINAP

cesium carbonate

→

desired product

المردود 92.6%

6-Methoxy-8-(4-methyl-[1,4]diazepan-1-yl)-4-(2-trimethylsilanyl-ethoxymethoxy)-quinoline-2-carboxylic acid methyl ester

المردود 92.6%

المذيبات

toluene

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe reaction mixture was heated
2. 2
   درجة الحرارةat reflux under nitrogen for 21 hours
3. 3
   تركيزconcentrated
4. 4
   أخرىThe crude mixture was purified by flash chromatography on silica gel using a gradient of 95:5 to 40:60 methylene chloride

الإجراء التجريبي

To a clear, light brown solution of 2-bromo-6-methoxy-4-(2-trimethylsilanyl-ethoxymethoxy)-quinoline-2-carboxylic acid methyl ester (1.01 g, 2.28 mmol), N-methylhomopiperazine (0.32 mL, 2.57 mmol), and 4 Å sieves in 30 mL anhydrous toluene was added Pd2 (dba)2 (43.8 mg, 0.048 mmol) and BINAP (169.8 mg, 0.27 mmol). The resulting wine colored solution was treated with cesium carbonate (1.124 g, 3.45 mmol). The reaction mixture was heated at reflux under nitrogen for 21 hours. The pea green reaction mixture was cooled to room temperature and concentrated. The crude mixture was purified by flash chromatography on silica gel using a gradient of 95:5 to 40:60 methylene chloride:methanol to afford the desired product as a yellow foam (1.004 g, 92%). 1H NMR (300 MHz, DMSO, d6) δ 7.67 (s, 1 H, ArH3), 6.94 (d, 1 H, Jm=2.4 Hz, ArH5), 6.66 (d, 1 H, Jm=2.4 Hz, ArH7), 5.60 (s, 2 H, OCH2O), 3.94 (s, 3 H, CO2CH3), 3.88 (s, 3 H, OCH3), 3.82 (t, 2 H, J=8.0 Hz, OCH2CH2Si), 3.75 (bs, 4 H, ArNCH2CH2CH2NCH3 & ArNCH2CH2N—CH3), 3.45 (bs, 2 H, ArNCH2CH2NCH3), 3.31 (bs, 2 H, ArNCH2CH2CH2NCH3), 2.83 (s, 3 H, NCH3), 2.28 (bs, 2 H ArNCH2CH2 CH2NCH3), 0.92 (t, 2 H, J=8.0 Hz, OCH2CH2Si), −0.04 (s, 9 H, Si(CH3)3; Mass Spec.: calc. for [C24H37N3O5Si+H]+ Theor. m/z=476; Obs. 476.

المصدر