تفاعل #2075737

معادلة التفاعل

Iodomethane

DMF

2-methyl-3-nitrobenzoic acid

→

methyl 2-methyl-3-nitrobenzoate

المردود 100.0%

المذيبات

water

ظروف التفاعل

المعالجة

1. 1
   ترشيحthe resulting precipitate collected by filtration
2. 2
   تجفيفdried over P2O5

الإجراء التجريبي

With reference to FIG. 4, DMF (130 mL) was added to a well mixed 2-methyl-3-nitrobenzoic acid 2 (50 g, 0.28 mol) and KHCO3 (84 g, 0.84 mol) solution. Since the mixture became highly viscous, it was heated to 40° C. with manual shaking. Iodomethane (79 g, 0.56 mol) was added via syringe after the gas evolution had ceased. The resulting orange colored solution was stirred for 12 hours at room temperature. The reaction mixture was poured into water (800 mL), and the resulting precipitate collected by filtration and dried over P2O5 to give pure methyl 2-methyl-3-nitrobenzoate 3 (56 g, 100%) as a white solid: mp. 64.2-65.5° C.; 1H-NMR (CDCl3) δ 8.00 (d, J=7.8 Hz, 1H), 7.85 (d, J=8.0 Hz, 1H), 7.39 (t, J=8.0 Hz, 1H), 3.95 (s, 3H), 2.63 (s, 3H); IR (KBr, cm−1) 1724, 1548, 1279; MS (EI): 195 (M+).

المصدر