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Chemical Structure| 1202552-53-1 Chemical Structure| 1202552-53-1

Structure of 1202552-53-1

Chemical Structure| 1202552-53-1

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Product Details of [ 1202552-53-1 ]

CAS No. :1202552-53-1
Formula : C8H11BrN2O2S
M.W : 279.15
SMILES Code : CCS(=O)(NCC1=CC(Br)=CN=C1)=O

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Application In Synthesis of [ 1202552-53-1 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 1202552-53-1 ]

[ 1202552-53-1 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 113118-81-3 ]
  • [ 1520-70-3 ]
  • [ 1202552-53-1 ]
YieldReaction ConditionsOperation in experiment
79% Intermediate A- 11Ethanesulfonic acid (5-bromo-pyridin-3-ylmethyl)-amideA flask was charged with 5-bromonicotinaldehyde (2.55 g, 13.7 mmol),<strong>[1520-70-3]ethanesulfonamide</strong> (2.99 g, 27.4 mmol) and toluene (250 mL), then titanium isopropoxide (5.84 g, 20.6 mmol) was added dropwise. The reaction mixture was heated to 115 °C over night and then concentrated in vacuo. The residue was taken up in DCM (200 mL) and MeOH (200 mL) and NaBH4 (1.04 g, 27.4 mmol) was added portionwise at 0 °C. The reaction mixture was stirred at 0 °C for 30 min and then poured into water (100 mL) and the resulting suspension was filtered through a pad of Dicalite and washed with DCM (3 x 100 mL). The aqueous layer was separated and extracted with DCM (2 x 200 mL).Combined organics were dried over Na2S04, filtered and preadsorbed on silica gel. The residue was purified by silica gel flash chromatography eluting with a 0 to 5percent MeOH- DCM gradient to give the title compound (3.01 g, 79percent) as an orange solid. MS: 279.0, 281.0 (M+H+).
79% A flask was charged with 5-bromonicotinaldehyde (2.55 g, 13.7 mmol),<strong>[1520-70-3]ethanesulfonamide</strong> (2.99 g, 27.4 mmol) and toluene (250 mL), then titanium isopropoxide (5.84 g, 20.6 mmol) was added dropwise. The reaction mixture was stirred at 115 °C over night and then concentrated in vacuo. The residue was taken up in DCM (200 mL) and MeOH (200 mL) and NaBH4 (1.04 g, 27.4 mmol) was added portionwise at 0 °C. The reaction mixture was stirred at 0 °C for 30 min and then poured into water (100 mL) and the resulting suspension was filtered through a pad of dicalite. The dicalite layer was washed with DCM (3x 100 mL). The resulting aqueous layer was separated and extracted with DCM (500 mL). Combined organics were dried over Na2S04, filtered and preadsorbed on silica gel. The residue was purified by silica gel flash chromatography eluting with a 0 to 5percent MeOH-DCM gradient to give the title compound (3.01 g, 79percent) as an orange solid. MS: 279.0, 281.0 (M+H+).
With sodium tris(acetoxy)borohydride; acetic acid; triethylamine; In 1,1-dichloroethane; at 20℃; for 3h; To a solution of 5-bromo-3-pyndmecarboxaldehyde (CASNo. 113118-81-3, 450 mg, 2 4 mmol) in dichloroethane (15 mL) was added <strong>[1520-70-3]ethanesulfonamide</strong> (CASNo. 1520-70-3, 175 mg, 1 6 mmol), acetic acid (0 18 mL 3.2 mmol), triethylamtne (0.45 mL, 3 2 mmol) and sodium triacetoxyborohydride (1.0g, 4 8 mmol) The reaction was stirred at room temperature for 3 hours, at which time it was diluted with dichloromethane and saturated aqueous sodium bicarbonate The layers were separated and the aqueous layer was extracted two additional times with dichloromethane The organic layers were combined, dried over anhydrous sodium sulfate, filtered, and concentrated The resulting residue was purrfied by silica gel flash chromatography (ethyl acetate-heptane, 10 to 100percent) to provide ethanesulfonic acid (5-bromo-pyridm-3-ylmethyl)-arnide, MS (ES+) m/z 278 9 (M+H)
 

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