تفاعل #2446131

معادلة التفاعل

2-iodo-5-methylbenzoic acid

1,2,3-triazole

trans-N,N′-dimethylcyclohexane-1,2-diamine

→

2-(2H-1,2,3-triazol-2-yl)-5-methylbenzoic Acid

المذيبات

water

DMF

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe reaction was cooled to room temperature
2. 2
   غسيلwashed with EtOAc
3. 3
   استخلاصextracted with EtOAc
4. 4
   تجفيفThe organic layer was dried over Na2SO4
5. 5
   ترشيحfiltered
6. 6
   تركيزconcentrated
7. 7
   أخرىThe residue was purified by gradient elution on SiO2 (0 to 10% MeOH in water with 0.1% AcOH)
8. 8
   أخرىto give the
9. 9
   غسيلfaster eluting 2-(2H-1,2,3-triazol-2-yl)-5-methylbenzoic acid B-2

الإجراء التجريبي

A solution of 2-iodo-5-methylbenzoic acid (4.0 g, 15.3 mmol) in DMF (10 mL) was treated with 1,2,3-triazole (2.1 g, 30.5 mmol), CsCO3 (9.95 g, 30.5 mmol), CuI (0.145 g, 0.76 mmol) and trans-N,N′-dimethylcyclohexane-1,2-diamine (0.43 g, 3.05 mmol). The mixture was heated at 120° C. for 10 min in a microwave reactor. The reaction was cooled to room temperature, diluted with water, and washed with EtOAc. The aqueous phase was acidified with 1N HCl and extracted with EtOAc. The organic layer was dried over Na2SO4, filtered and concentrated. The residue was purified by gradient elution on SiO2 (0 to 10% MeOH in water with 0.1% AcOH) to give the faster eluting 2-(2H-1,2,3-triazol-2-yl)-5-methylbenzoic acid B-2, followed by the undesired regioisomer isomer, 1-(2H-1,2,3-triazol-2-yl)-5-methylbenzoic acid. Data for B-2: 1HNMR (500 MHz, DMSO-d6) δ 12.98 (br s, 1H), 8.04 (s, 2H), 7.72-7.45 (m, 3H), 2.41 (s, 3H) ppm.

المصدر