반응 #159820

반응 방정식

3-pyridineboronic acid

Na2CO3

water

4-Iodo-2-nitro-1-(phenylsulfonyl)-benzene

→

3-(3-nitro-4-(phenylsulfonyl)phenyl)pyridine

수율 70.5%

용매

water ethanol

반응 조건

후처리

1. 1
   온도cooled to 80° C
2. 2
   workup.WAITinert gas was passed for another 10 min
3. 3
   workup.WAITargon was passed for additional 5 min
4. 4
   workup.STIRRINGThe reaction mixture was stirred for 2 h at 85° C. in argon atmosphere
5. 5
   온도cooled
6. 6
   기타precipitated solid
7. 7
   여과was filtered off
8. 8
   추출The reaction product was extracted from mother liquor with CH2Cl2, organic layer
9. 9
   건조was dried over Na2SO4
10. 10
    여과filtered
11. 11
    기타evaporated to dryness
12. 12
    여과filtered off
13. 13
    기타mother liquor was evaporated
14. 14
    세척the residue washed with diethyl ether, it

실험 절차

Argon was passed through a mixture of 3-pyridineboronic acid (187 mg, 1.53 mmol) and Na2CO3 (408 mg, 3.84 mmol) in water ethanol (water 3.74 ml, ethanol 14.96 ml) at stirring at 90° C. for 30 min and cooled to 80° C. 4-Iodo-2-nitro-1-(phenylsulfonyl)-benzene 4(3) (734 mg, 1.9 mmol) was added to the reaction mixture in argon current, inert gas was passed for another 10 min, then bis-triphenylphosphinepalladium dichloride (34 mg) was added and argon was passed for additional 5 min. The reaction mixture was stirred for 2 h at 85° C. in argon atmosphere, then, cooled, water was added, and precipitated solid was filtered off. The reaction product was extracted from mother liquor with CH2Cl2, organic layer was dried over Na2SO4, filtered and evaporated to dryness. The residue was suspended in CH2Cl2, filtered off, mother liquor was evaporated, the residue washed with diethyl ether, it gave 460 mg (70.5%) of 3-(3-nitro-4-(phenylsulfonyl)phenyl)pyridine 5(1).

출처