تفاعل #430929

معادلة التفاعل

ammonia

water

2-methoxycarbonyl-3-methyl-4-nitrobenzenesulfonyl chloride

→

4-Methyl-5-nitro-1,1,3-trioxo-2,3-dihydro-1λ6 benz[d]isothiazole

المذيبات

tetrahydrofuran

ظروف التفاعل

المعالجة

1. 1
   تركيزthe mixture is concentrated on a rotary evaporator in order
2. 2
   أخرىto remove water and THF
3. 3
   workup.STIRRINGThe residue which remains is stirred with ethyl acetate
4. 4
   ترشيحfiltered off with suction
5. 5
   غسيلwashed with ethyl acetate
6. 6
   أخرىAfter drying under reduced pressure, 34 g (0.131 mol)=79% of theory of a white solid of m.p.: 312° C. (dec.)
7. 7
   أخرىare obtained

الإجراء التجريبي

104 ml of 25 percent ammonia solution are initially taken, 100 ml of water are added and a solution of 48.7 g (0.166 mol) of 2-methoxycarbonyl-3-methyl-4-nitrobenzenesulfonyl chloride in 70 ml of tetrahydrofuran is then added dropwise at 10° C. After stirring at 25° C. for three hours, the mixture is concentrated on a rotary evaporator in order to remove water and THF. The residue which remains is stirred with ethyl acetate, filtered off with suction and washed with ethyl acetate. After drying under reduced pressure, 34 g (0.131 mol)=79% of theory of a white solid of m.p.: 312° C. (dec.) are obtained.

المصدر