تفاعل #2270

معادلة التفاعل

dimethylcarbonate

sodium hydride

5-chloroindanone

hydrogen

→

desired product

المردود 45.0%

2-carbomethoxy-5-chloroindanone

المردود 45.0%

المذيبات

dimethoxyethane

dimethoxyethane

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONwas added dropwise at room temperature
2. 2
   درجة الحرارةThe reaction was cooled to room temperature
3. 3
   أخرىquenched with 100 ml H2O
4. 4
   استخلاصextracted with ethyl ether (3×100 ml)
5. 5
   استخلاصThe ether extract
6. 6
   غسيلwas washed with brine (100 ml)
7. 7
   تجفيفdried over anhydrous MgSO4

الإجراء التجريبي

To a mixture of sodium hydride (2.4 g, 60% in mineral oil, 0.06. mole) and 50 ml dry dimethoxyethane, 5-chloroindanone (50 g, 0.03 mole) in 50 ml dimethoxyethane was added dropwise at room temperature. The mixture was stirred at room temperature until hydrogen evolution ceased. Then dimethylcarbonate (27 g, 0.3 mole) was added dropwise at room temperature and the reaction was heated to 60° C. for one hour. The reaction was cooled to room temperature, quenched with 100 ml H2O, acidified to pH 5 with concentrated HCl and extracted with ethyl ether (3×100 ml). The ether extract was washed with brine (100 ml), dried over anhydrous MgSO4 and stripped to yield 3.0 g (45%) of the desired product as a tan solid.

المصدر