تفاعل #2045057

معادلة التفاعل

potassium carbonate

sodium iodide

disodium phosphate

methylchloroacetate

Methylchloroacetate

salicylic acid

triethylamine

→

93

2-Methoxycarbonylmethoxy-benzoic acid methoxycarbonylmethyl ester

المذيبات

acetone

acetone

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةheated
2. 2
   درجة الحرارةto reflux for 10 hrs
3. 3
   ترشيحSolids were filtered off
4. 4
   درجة الحرارةrefluxed for 16 hrs
5. 5
   workup.DISTILLATIONAcetone was distilled off
6. 6
   workup.ADDITIONwater (125 ml) added
7. 7
   استخلاصCrude 93 was extracted into chloroform
8. 8
   غسيلwashed with 5% sodium bicarbonate solution (2×50 ml), with water (2×50 ml)
9. 9
   تجفيفdried over sodium sulphate
10. 10
    workup.DISTILLATIONdistilled
11. 11
    أخرىCrude 93 was purified by column chromatography on silica gel

الإجراء التجريبي

Methylchloroacetate (9.4 g, 86.66 mmol) was added dropwise to a mixture of salicylic acid (10 g, 72.46 mmol) and triethylamine (8.8 g, 86.96 mmol) in acetone (50 ml) and heated to reflux for 10 hrs. Solids were filtered off and potassium carbonate (25 g, 180.89 mmol) was added to the acetone layer together with sodium iodide (2 gm, 13.34 mmol), disodium phosphate (2 g, 14.16 mmol) and methylchloroacetate (9.4 g, 86.66 mmol) and refluxed for 16 hrs. Acetone was distilled off and water (125 ml) added. Crude 93 was extracted into chloroform, washed with 5% sodium bicarbonate solution (2×50 ml), with water (2×50 ml), dried over sodium sulphate and distilled. Crude 93 was purified by column chromatography on silica gel using benzene to get pure 93 (12 g, 58.7%) as a syrup.

المصدر