تفاعل #1925206

معادلة التفاعل

trimethylacetyl chloride

4-Chloroaniline

sodium hydroxide

water

→

title compound

المردود 97.2%

N-(4-chlorophenyl)-2,2-dimethyl propanamide

المردود 97.2%

المذيبات

t-butyl methyl ether

ظروف التفاعل

المعالجة

1. 1
   أخرىthe temperature below 40° C
2. 2
   درجة الحرارةwas cooled to −10° C.
3. 3
   workup.WAITheld for 2 hours
4. 4
   ترشيحThe product was collected by filtration
5. 5
   غسيلwashed with a solution of 90/10 water/methanol (175 kg)
6. 6
   أخرىdried in vacuo

الإجراء التجريبي

4-Chloroaniline (52.7 kg, 413 mol) was dissolved in a mixture of t-butyl methyl ether (180 kg), 30% aqueous sodium hydroxide (61.6 kg, 463 mol) and water (24.2 kg), then cooled to 15° C. To the resulting slurry was charged trimethylacetyl chloride (52.2 kg, 448 mol) over 1 h, keeping the temperature below 40° C. After stirring 30 min at 30° C. the slurry was cooled to −10° C. and held for 2 hours. The product was collected by filtration, washed with a solution of 90/10 water/methanol (175 kg), then dried in vacuo to give 85 kg (97% yield) of the title compound as a crystalline solid: mp 152-153° C.; 1H NMR (300 MHz, CDCl3) δ 7.48 (d, J=9 Hz, 2H) 7.28 (d, J=9 Hz, 2H); 13C NMR (75 MHz, CDCl3) d 176.7, 136.6, 129.1, 128.9, 121.4, 39.6, 27.6.

المصدر