تفاعل #1112346

معادلة التفاعل

2-bromoacetamide

DMF

cesium carbonate

methyl 4-hydroxy-2-methoxybenzoate

→

methyl 4-(2-amino-2-oxoethoxy)-2-methoxybenzoate

المردود 91.4%

المذيبات

DCM

ظروف التفاعل

المعالجة

1. 1
   أخرىThe tube was sealed
2. 2
   غسيلwashed sequentially with 10 mL of 1M HCl, water, and brine
3. 3
   تجفيفThe solution was dried over sodium sulfate
4. 4
   ترشيحfiltered
5. 5
   أخرىthe solvent removed

الإجراء التجريبي

To a sealed tube was added 2-bromoacetamide (2.272 g, 16.47 mmol), DMF (50 mL), cesium carbonate (7.15 g, 21.96 mmol) and methyl 4-hydroxy-2-methoxybenzoate (1.00 g, 5.49 mmol). The tube was sealed and heated for 16 hours at 85° C. The reaction mixture was diluted with DCM, washed sequentially with 10 mL of 1M HCl, water, and brine. The solution was dried over sodium sulfate, filtered and the solvent removed to give 1.2 grams of methyl 4-(2-amino-2-oxoethoxy)-2-methoxybenzoate (78% yield) as a yellow powder. The LC/MS data was obtained on a Shimadzu analytical LC/Micromass Platform LC (ESI+) at 220 nm using the following set of conditions: Waters Sunfire 5 μm C18, 4.6×30 mm column, with a gradient of 0-100% B (B=90% HPLC grade methanol/0.1% trifluoroacetic acid/10% HPLC grade water), (A=90% HPLC grade water/0.1% trifluoroacetic acid/10% HPLC grade methanol), in 2 minutes with a 1 minute hold at a rate of 4 mL/minute. 1H NMR (400 MHz, THF-d8) δ ppm 3.71-3.76 (m, 3 H), 3.80-3.84 (m, 3 H), 4.45 (s, 2 H), 6.56 (dd, J=8.66, 2.38 Hz, 1 H), 6.65 (d, J=2.26 Hz, 1 H), 6.77 (br. s., 1 H), 6.92 (br. s., 1 H), 7.75 (d, J=8.78 Hz, 2 H). LCMS Rt=1.385 min., m/z 240.2 (M+H), 92% purity.

المصدر