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Chemical Structure| 78797-58-7 Chemical Structure| 78797-58-7

Structure of 78797-58-7

Chemical Structure| 78797-58-7

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Product Details of [ 78797-58-7 ]

CAS No. :78797-58-7
Formula : C3H9Cl2N
M.W : 130.02
SMILES Code : [H]Cl.[H]Cl.N1CCC1

Safety of [ 78797-58-7 ]

Application In Synthesis of [ 78797-58-7 ]

* 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 [ 78797-58-7 ]

[ 78797-58-7 ] Synthesis Path-Downstream   1~4

  • 1
  • [ 78797-58-7 ]
  • [ 7043-09-6 ]
  • 4-(1-azetidinyl)-6-chloro-2-cyclopropylpyrimidine [ No CAS ]
  • 2
  • [ 105806-13-1 ]
  • [ 78797-58-7 ]
  • [ 1152110-15-0 ]
YieldReaction ConditionsOperation in experiment
55% Part A: 4-Azetidino-6-hydrazino-5-fluoro-2-methylpyrimidine. 4,6-Dichloro-5-fluoro-2-methylpyrimidine (6 g, 33 mmol) was dissolved in 50 ml. of iPrOH and stirred at room temperature. Azetidine-HCI (3.25 g, 35 mmol) was added, followed by 14.4 ml. of DIPEA. The resulting reaction mixture was stirred for 3 h, and then hydrazine monohydrate was added (4.0 ml_, 82.5 mmol) and the contents were heated to 80 0C overnight. The reaction mixture was then cooled to room temperature and a precipitate formed. The precipitate was filtered, washed with iPrOH, and dried. The remaining filtrate was poured into 250 ml. of water and extracted (5 x 100 ml.) with EtOAc. The combined organic fractions were washed with water (2 x 100 ml.) and brine (2 x 100 ml_). The organics were dried over sodium sulfate, filtered, and concentrated in vacuo. This crude product was purified by flash chromatography on silica gel using 97.5/2.5/0.25 DCM/MeOH/NH4OH as the eluent. The overall combined yield of 4- azetidino-6-hydrazino-5-fluoro-2-methylpyrimidine (precipitate + chromatographed product) was 3.6 g (55%). LCMS: (M+H)+: 198.
  • 3
  • [ 67515-55-3 ]
  • [ 78797-58-7 ]
  • [ 1177420-64-2 ]
YieldReaction ConditionsOperation in experiment
78% With N-ethyl-N,N-diisopropylamine; HATU; In dichloromethane; at 20℃; for 4h;Inert atmosphere; (54a) 1-[4-Fluoro-3-(trifluoromethyl)benzoyl]azetidine Commercially available <strong>[67515-55-3]4-fluoro-3-(trifluoromethyl)benzoic acid</strong> (230 mg, 1.10 mmol) was dissolved in dichloromethane (50 mL), and azetidine hydrochloride (120 mg, 1.28 mmol), HATU (550 mg, 1.45 mmol) and N,N-diisopropylethylamine (0.50 mL, 2.87 mmol) were added, followed by stirring at room temperature for 4 hours under nitrogen atmosphere. 0.5N hydrochloric acid (100 mL) was added, and extraction was carried out with dichloromethane (100 mL). The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: ethyl acetate/hexane=60%-80%) to afford the desired compound (211 mg, yield 78%) as a colorless liquid. 1H-NMR (CDCl3, 400 MHz): delta 2.35-2.43 (2H, m), 4.25 (2H, t, J=7.6 Hz), 4.33 (2H, t, J=7.4 Hz), 7.83-7.87 (1H, m), 7.93 (1H, dd, J=6.6, 2.0 Hz).
  • 4
  • [ 37482-64-7 ]
  • [ 78797-58-7 ]
  • 2-(azetidin-1-yl)-4-ethoxy-6-methylpyrimidine [ No CAS ]
YieldReaction ConditionsOperation in experiment
84% With copper(l) iodide; 3,4,7,8-Tetramethyl-o-phenanthrolin; caesium carbonate; In N,N-dimethyl-formamide; at 50.0℃; for 3.0h;Inert atmosphere; To a round bottom flask containing 600 mg (3.48 mmol) of <strong>[37482-64-7]2-chloro-4-ethoxy-6-methylpyrimidine</strong>, 489 mg (5.22 mmol) of azetidine hydrochloride, 131 mg (0.69 mmol) of CuI, 164 mg (0.69 mmol) of 3,4,7,8-tetramethyl-1,10-phenanthroline and 2.83 g (8.70 mmol) of Cs2CO3 was added 15 mL of dry, degassed DMF. The reaction mixture was stirred at 50 C for 3 h. The cooled reaction mixture was filtered through Celite and the Celite pad was washed with portions of CH2Cl2. The combined organic phase was washed with water and then with brine, dried (MgSO4) and concentrated under diminished pressure. The residue was purified by flash chromatography on a silica gel column (15 * 3 cm). Elution with 19:1 hexane/EtOAc followed by 9:1 hexane/EtOAc afforded 18 as a colorless solid: yield 565 mg (84%); mp 42-43 C; silica gel TLC Rf 0.29 (3:2 hexane/EtOAc); 1H NMR (CDCl3) delta 1.24 (t, 3H, J = 7.2 Hz), 2.16 (s, 3H), 2.20 (quint, 2H, J = 7.6 Hz), 4.01 (t, 4H, J = 7.6 Hz), 4.20 (q, 2H, J = 7.2 Hz) and 5.73 (s, 1H); 13C NMR (CDCl3) delta 14.4, 16.1, 23.9, 49.9, 61.2, 95.0, 163.0, 167.7 and 170.1; mass spectrum (APCI), m/z 194.1289 (M+H)+ (C10H16N3O requires m/z 194.1293).
84% With copper(l) iodide; 3,4,7,8-Tetramethyl-o-phenanthrolin; caesium carbonate; In N,N-dimethyl-formamide; at 50.0℃; for 3.0h; To a round bottom flask containing 600 mg (3.48 mmol) of 39, 489 mg (5.22 mmol) of azetidine hydrochloride, 131 mg (0.69 mmol) of Cul, 164 mg (0.69 mmol) of 3,4,7,8-tetramethyl- 1,10-phenanthroline and 2.83 g (8.70 mmol) of Cs2CO3 was added 15 mL of dry degassed DMF. The reaction mixture was stirred at 50 C for 3 h. The mixture was allowed to cool to room temperature and then filtered through Celite and the Celite pad was washed with CH2C12. The combined organic phase was washed with water and then with brine, dried (MgSO4) and concentrated under diminished pressure. The residue was purified by flash chromatography on a silica gel column (15 x 3 cm). Elution with 19:1 hexane-EtOAc followed by 9:1 hexane-EtOAc afforded 40 as a colorless solid:yield 565 mg (84%); mp 42-43 C; silica gel TLC Rf 0.29 (3:2 hexane-EtOAc); ?H NMR (CDC13, 400 MHz) 8 1.24 (t, 3H,J 7.2 Hz), 2.16 (s, 3H), 2.20 (quint, 2H,J 7.6 Hz), 4.01 (t, 4H,J 7.6 Hz), 4.20 (q, 2H,J= 7.2 Hz) and 5.73 (s, 1H); ?3C NMR (CDC13, 100 MHz) 6 14.4, 16.1,23.9,49.9,61.2, 95.0, 163.0, 167.7 and 170.1; mass spectrum (APCI), rn/z 194.1289 (M+H) (C,0H,6N30 requires 194.1293).
 

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