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Chemical Structure| 889362-84-9 Chemical Structure| 889362-84-9

Structure of 889362-84-9

Chemical Structure| 889362-84-9

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Product Details of [ 889362-84-9 ]

CAS No. :889362-84-9
Formula : C14H20FNO2S
M.W : 285.38
SMILES Code : S=C(NC1=CC(F)=CC(OC(C)(C)C)=C1)OC(C)C
MDL No. :MFCD31555679

Safety of [ 889362-84-9 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P280-P301+P312-P302+P352-P305+P351+P338

Application In Synthesis of [ 889362-84-9 ]

* 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 [ 889362-84-9 ]

[ 889362-84-9 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 889362-84-9 ]
  • [ 67442-07-3 ]
  • [ 1426954-84-8 ]
YieldReaction ConditionsOperation in experiment
17.9% Under a nitrogen atmosphere, a solution of ferf-butyllithium (481 ml, 737.6 mmol, 1.6 M) was added dropwise to a solution of (3-tert-Butoxy-5-fluoro-phenyl)-thiocarbamic acid O-isopropyl ester (200 g, 700.83 mmol) in 2-Me-THF (1600 ml) at temperature below -65 °C. The reaction temperature was warmed to -35°C, and a second portion of ferf-butyllithium (388 ml, 737.6 mmol, 1 .9 M) was added slowly while keeping the temperature below -35 °C. The reaction mixture was then stirred at this temperature for 3 h and cooled down to -70 °C. A solution of /V-methyl-N-methoxy chloroacetamide (96.4 g, 700.83 mmol) in 2-MeTHF (300 ml) was added to the reaction mixture while keeping the temperature below -70 °C. The mixture was then warmed to -30 °C and stirred for 45 minutes. The cold reaction mixture was quenched by dropwise addition of 30percent HCI in isopropanol (240 g) followed by the addition of 1500 ml water. The organic layer was washed sequentially with 1000 ml water, 1500 ml saturated aqueous NaHC03 and 1500 ml brine. After concentration, the resulting light brown residue was added to isopropanol (135 ml). The mixture was warmed to 50 °C and cooled down slowly to 25 °C. n-heptane (135 ml) was added dropwise to the solution and the mixture was stirred overnight. The slurry was filtered and the filter cake was washed with n- heptane (40 ml) followed by another portion of n-heptane (20 ml). The cake was dried under vacuum to yield 1-(5-fert-butoxy-2-isopropoxy-benzothiazol-7-yl)-2-chloro-ethanone as off- white powder (42.8 g, 17.9percent yield). 1H NMR (400 MHz, CDCI3): 7.60 (d, J = 2.0 Hz, 1 H), 7.45 (d, J = 2.0 Hz, 1 H), 5.40 (heptet, J = 6.3 Hz, 1 H), 4.77 (s, 2H), 1 .47 (d, J = 6.3 Hz, 6H), 1.40 (s, 9H). LCMS: [M+H]+ = 342.1 , RT = 7.29 min.
17.9% Under a nitrogen atmosphere, a solution of ferf-butyllithium (481 ml, 737.6 mmol, 1.6 M) was added dropwise to a solution of (3-tert-Butoxy-5-fluoro-phenyl)-thiocarbamic acid O-isopropyl ester (200 g, 700.83 mmol) in 2-Me-THF (1600 ml) at temperature below -65 °C. The reaction temperature was warmed to -35°C, and a second portion of ferf-butyllithium (388 ml, 737.6 mmol, 1 .9 M) was added slowly while keeping the temperature below -35 °C. The reaction mixture was then stirred at this temperature for 3 h and cooled down to -70 °C. A solution of /V-methyl-N-methoxy chloroacetamide (96.4 g, 700.83 mmol) in 2-MeTHF (300 ml) was added to the reaction mixture while keeping the temperature below -70 °C. The mixture was then warmed to -30 °C and stirred for 45 minutes. The cold reaction mixture was quenched by dropwise addition of 30percent HCI in isopropanol (240 g) followed by the addition of 1500 ml water. The organic layer was washed sequentially with 1000 ml water, 1500 ml saturated aqueous NaHC03 and 1500 ml brine. After concentration, the resulting light brown residue was added to isopropanol (135 ml). The mixture was warmed to 50 °C and cooled down slowly to 25 °C. n-heptane (135 ml) was added dropwise to the solution and the mixture was stirred overnight. The slurry was filtered and the filter cake was washed with n- heptane (40 ml) followed by another portion of n-heptane (20 ml). The cake was dried under vacuum to yield 1-(5-fert-butoxy-2-isopropoxy-benzothiazol-7-yl)-2-chloro-ethanone as off- white powder (42.8 g, 17.9percent yield). 1H NMR (400 MHz, CDCI3): 7.60 (d, J = 2.0 Hz, 1 H), 7.45 (d, J = 2.0 Hz, 1 H), 5.40 (heptet, J = 6.3 Hz, 1 H), 4.77 (s, 2H), 1 .47 (d, J = 6.3 Hz, 6H), 1.40 (s, 9H). LCMS: [M+H]+ = 342.1 , RT = 7.29 min.
17.9% With tert.-butyl lithium; In 2-methyltetrahydrofuran; at -70 - -30℃; for 3.75h; c) 1-(5-tert-Butoxy-2-isopropoxy-benzothiazol-7-yl)-2-chloro-ethanone Under a nitrogen atmosphere, a solution of ferf-butyllithium (481 ml, 737.6 mmol, 1.6 M) was added dropwise to a solution of (3-fert-Butoxy-5-fluoro-phenyl)-thiocarbamic acid O-isopropyl ester (200 g, 700.83 mmol) in 2-Me-THF (1600 ml) at temperature below -65 °C. The reaction temperature was warmed to -35°C, and a second portion of ferf-butyllithium (388 ml, 737.6 mmol, 1 .9 M) was added slowly while keeping the temperature below -35 °C. The reaction mixture was then stirred at this temperature for 3 h and cooled down to -70 °C. A solution of /V-methyl-N-methoxy chloroacetamide (96.4 g, 700.83 mmol) in 2-MeTHF (300 ml) was added to the reaction mixture while keeping the temperature below -70 °C. The mixture was then warmed to -30 °C and stirred for 45 minutes. The cold reaction mixture was quenched by dropwise addition of 30percent HCI in isopropanol (240 g) followed by the addition of 1500 ml water. The organic layer was washed sequentially with 1000 ml water, 1500 ml saturated aqueous NaHC03 and 1500 ml brine. After concentration, the resulting light brown residue was added to isopropanol (135 ml). The mixture was warmed to 50 °C and cooled down slowly to 25 °C. n-heptane (135 ml) was added dropwise to the solution and the mixture was stirred overnight. The slurry was filtered and the filter cake was washed with n- heptane (40 ml) followed by another portion of n-heptane (20 ml). The cake was dried under vacuum to yield 1 -(5-ferf-butoxy-2-isopropoxy-benzothiazol-7-yl)-2-chloro-ethanone as off- white powder (42.8 g, 17.9percent yield). 1 H NMR (400 MHz, CDCI3): 7.60 (d, J = 2.0 Hz, 1 H), 7.45 (d, J = 2.0 Hz, 1 H), 5.40 (heptet, J = 6.3 Hz, 1 H), 4.77 (s, 2H), 1.47 (d, J = 6.3 Hz, 6H), 1 .40 (s, 9H). LCMS: [M+H]+ = 342.1 , RT = 7.29 min
 

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