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Chemical Structure| 214337-28-7 Chemical Structure| 214337-28-7

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Chemical Structure| 214337-28-7

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Product Details of [ 214337-28-7 ]

CAS No. :214337-28-7
Formula : C8H6BrNOS
M.W : 244.11
SMILES Code : OCC1=CC=C2N=C(Br)SC2=C1
MDL No. :MFCD20527995

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Application In Synthesis of [ 214337-28-7 ]

* 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 [ 214337-28-7 ]

[ 214337-28-7 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 99073-88-8 ]
  • [ 214337-28-7 ]
YieldReaction ConditionsOperation in experiment
99% With diisobutylaluminium hydride; In dichloromethane; toluene; at -78℃; for 2.08333h; To a solution of ethyl 2-bromobenzo[djthiazole- 6-carboxylate (1.00 g, 3.49 mmol) in DCM (17 ml) at -78 C was added DIBAL-H in toluene(7.5 ml, 7.5 mmol, 1.0 M) slowly over 5 mm and the resulting mixture was stirred at -78 C for 2 h. The reaction was quenched at -78 C with 1 M Rochelle salt (10 mL) and allowed to warm to rt over 30 mm. The aqueous layer was extracted with 1:10 IPAIDCM (3 x 10 mL) and the combined organics were dried over MgSO4, filtered, and concentrated. The title compound was 1Solated as a pale yellow solid (841 mg, 99%). MS (ES+) C8H6BrNOSrequires: 243, found: 244 [M+Hf?. ?H NMR (600 MHz, Chloroform-d) oe 7.96 (d, J = 8.4 Hz,1H), 7.85 (s, 1H), 7.45 (dd, J= 8.4, 1.6 Hz, 1H), 4.83 (d, J= 5.8 Hz, 2H), 1.81 (t, J 5.9 Hz,1H)
80% With diisobutylaluminium hydride; In dichloromethane; at -78℃; for 2h; Step 2: To a solution of ethyl 2-bromobenzo[d]thiazole-6-crboxylate (5.0 g, 17.5 mmol) from Step 1 of thisExample in anhydrous CH2Cl2 was added DIBAL-H (1.0 M in CH2Cl2, 36.7 mL, 36.7 mmol) slowly at -78 C. The solutionwas stirred at -78 C for 2 h. The resulting mixture was quenched with 10 mL of saturated aq sodium potassium tartrateat -78 C. After slowly warming to 0 C, the mixture was further treated with 50 mL of saturated aq sodium potassiumtartrate and stirred at rt for 2 h. The aqueous layer was separated and extracted with CH2Cl2 (3 x 100 mL). The combinedorganic layers were washed with brine, dried over MgSO4, and concentrated under reduced pressure. The crude productwas purified on a silica gel column using a mixture of EtOAc-hexanes (2:3, v/v) as eluent to give (2-bromobenzo[d]thiazol-6-yl)methanol as a white solid (3.4 g, 80%). 1H NMR (300 MHz, CDCl3) delta 7.96 (d, J = 8.3 Hz, 1H), 7.85 (s, 1H), 7.45(dd, J= 1.4, 8.4 Hz, 1H), 4.83 (s, 2H), 1.86 (br s, 1H). LCMS (ESI) m/z 244, 246 (M+H)+.
69% With lithium triethylborohydride; In tetrahydrofuran; at 0℃; for 1h; Intermediate 308A (0.85 g, 2.97 mmol) was dissolved in THF (20 mL) and cooledto 0 C. 1.0 M Super-Hydride in THF (6.54 mL, 6.54 mmol) was added dropwise to thiscooled solution. After stirring at 0 C for 1 h, the reaction was quenched with saturated ammonium chloride and then diluted with EtOAc. The organic layer was washed with brine, dried over sodium sulfate, filtered and concentrated. The crude product was purified by silica gel chromatography (24g, 5-60% EtOAc/Hexanes, 18 mm) to give Intermediate 308B (0.5 g, 2.048 mmol, 69.0 % yield) as a white solid. LC-MS. Method A, RT = 1.54 mm, MS (ESI)m/z: 244.0 and 246.0 (M+H). ?HNMR(500IVIHz, CHLOROFORM-d) 7.93 (d, J=8.5 Hz, 1H), 7.70 (d, J0.8 Hz, 1H), 7.39 (dd, J=8.4,1.5 Hz, 1H), 5.08 (s, 2H).
 

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