تفاعل #9271

معادلة التفاعل

N-(6-cyano-1,3-benzothiazol-2-yl)-N′-ethylurea

azidotributylstannane

→

N-Ethyl-N′-[6-(2H-1,2,3,4-tetraazol-5-yl)-1,3-benzothiazol-2-yl]urea

المذيبات

tetrahydrofuran

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةthen refluxed for about 48–72 hours
2. 2
   أخرىThe solvent was removed under reduced pressure
3. 3
   workup.ADDITIONAbout 0.5 mL of dilute aqueous hydrochloric acid was added
4. 4
   أخرىa white precipitate formed
5. 5
   ترشيحthe precipitate was collected by filtration
6. 6
   غسيلwashed with warm THF
7. 7
   أخرىthen dried under vacuum
8. 8
   أخرىLC/MS 1.37 min, 290 (M+1)

الإجراء التجريبي

About 30 mg N-(6-cyano-1,3-benzothiazol-2-yl)-N′-ethylurea was charged into about 5 mL dry tetrahydrofuran. Added about 2 g of azidotributylstannane then refluxed for about 48–72 hours. The solvent was removed under reduced pressure then the crude oil was taken up in dichloromethane. About 0.5 mL of dilute aqueous hydrochloric acid was added and a white precipitate formed. This was allowed to sit for about 30 minutes then the precipitate was collected by filtration, washed with warm THF then dried under vacuum. 1H NMR 1.10 (t, 3H), 3.2 (m, 2H), 6.76 (br s, 1H), 7.78 (d, 1H), 8.0 (d, 1H), 8.58 (s, 1H), 10.91 (s, 1H); LC/MS 1.37 min, 290 (M+1).

المصدر