تفاعل #2045069

معادلة التفاعل

5-Amino-8-hydroxy-2-methylquinoline

sodium azide

sodium nitrite

→

13

المردود 66.0%

5-Azido-8-hydroxy-2-methylquinoline

المردود 66.0%

المذيبات

hydrochloric acid

water

water

water

ظروف التفاعل

المعالجة

1. 1
   workup.STIRRINGThe mixture was stirred for 20 min
2. 2
   workup.STIRRINGstirred at 0° C. for a further 1.5 h
3. 3
   درجة الحرارةto warm to room temperature over 24 h in the dark
4. 4
   استخلاصIsolation by extraction with diethyl ether
5. 5
   أخرىgave a dark brown solid, which
6. 6
   أخرىwas recrystallized from light petroleum

الإجراء التجريبي

5-Amino-8-hydroxy-2-methylquinoline (12; 723 mg, 4.2 mmol) was dissolved in a solution of concentrated hydrochloric acid (0.4 mL) and water (5 mL), cooled to −3° C. in a salt-ice bath, stirred for 10 min, then treated dropwise with a cold solution of sodium nitrite (0.50 g, 7.2 mmol) in water (5 mL). The mixture was stirred for 20 min, then treated dropwise with sodium azide (0.60 g, 9.2 mmol) in water (40 mL), stirred at 0° C. for a further 1.5 h, then allowed to warm to room temperature over 24 h in the dark. Isolation by extraction with diethyl ether gave a dark brown solid, which was recrystallized from light petroleum to yield 13 as light brown crystals (554 mg, 66%). 1H NMR (500 MHz, CD3OD) δ ppm: 3.31 (s, 3H), 7.06 (d, J=8.5 Hz, 1H), 7.15 (d, J=8.5 Hz, 1H), 7.36 (d, J=8.5 Hz, 1H), 8.21 (d, J=8.5 Hz, 1H). 13C NMR (125 MHz, CD3OD) δ ppm: 24.9, 111.8, 115.6, 121.6, 123.7, 127.9, 132.6, 139.6, 151.1, 159.7. HRMS (ESI): calcd for C10H8N4O [M+H]+: 201.0771, found: 201.0773.

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