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Chemical Structure| 2031-23-4

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Product Details of [ 2031-23-4 ]

CAS No. :2031-23-4
Formula : C8H19Cl3N2
M.W : 249.61
SMILES Code : CN1CCN(CCCCl)CC1.[H]Cl.[H]Cl
MDL No. :MFCD00023304
InChI Key :RRZYWKLLIIIINP-UHFFFAOYSA-N
Pubchem ID :3014068

Safety of [ 2031-23-4 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of [ 2031-23-4 ]

* 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.

  • Upstream synthesis route of [ 2031-23-4 ]
  • Downstream synthetic route of [ 2031-23-4 ]

[ 2031-23-4 ] Synthesis Path-Upstream   1~2

  • 1
  • [ 109-01-3 ]
  • [ 109-70-6 ]
  • [ 2031-23-4 ]
YieldReaction ConditionsOperation in experiment
44.1% With sodium hydroxide In acetone at 20℃; for 24 h; Cooling with ice N-methylpiperazine (30 mmol, 3.3 ml), 4 ml of 25percent NaOH solution and 40 ml of acetone were added to a 100 ml round-bottomed flask under ice-cooling, then 1-bromo-3-chloropropane (30 mmol, 3 ml) After completion of ice bath stirring to insoluble material dissolved, and then at room temperature for 24h.The solvent was concentrated under reduced pressure, 20 ml of water-soluble concentrate was added, extracted with methylene chloride, dried over anhydrous sodium sulfate, filtered and concentrated to give a clear oil. The reaction flask was placed in an ice bath and 50 ml of ethyl acetate was added. 2.5 ml of concentrated hydrochloric acid was added dropwise slowly until a large amount of white solid was formed. The pH was controlled to about 2 during the reaction. The solvent was concentrated under reduced pressure, recrystallized from 100 ml of anhydrous ethanol, filtered and dried to obtain 3.3 g of a white solid,
25%
Stage #1: With sodium hydroxide In water; acetone at 0 - 20℃; for 24 h;
Stage #2: With hydrogenchloride In ethanol
A modified procedure of Mahesh et al, Pharmazie, 2005, 60, 6, 411-414, was used. After cooling a stirred solution of N-methylpiperazine (50 mmol, 5.55 ml) in 100 ml acetone to 0 °C, 10 ml of an aqueous 25 percent NaOH-solution and l-bromo-3-chloropropane (50 mmol, 7.87 g = 4.92 ml) were added cautiously. The reaction was stirred at RT for 24 hours. After concentrating the mixture under reduced pressure, the residue was diluted with water and extracted with dichloromethane. The collected organic phases were dried over Na2S04, filtered and concentrated. The residue was diluted with ethanol and after adding 2.3 M ethanolic HC1 l-(3-chloropropyl)-4-methylpiperazin-dihydrochloride crystallized as white crystals(12.5 mmol, 25 percent). Mp = 257 °C. ]H NMR (300 MHz, DMSO) 3.74 (t; 2H; 3J = 6.4 Hz; NCH7CH7CH7CI); 3.37 (m; 12H: NCH7CH7CH7Cl+4xpiperazin-CH7+2x H); 2.81 (s; 3H; CH3); 2.19 (d; 2H; J = 6.8 Hz; NCH2CH2CH2CI).
References: [1] Patent: CN105884699, 2016, A, . Location in patent: Paragraph 0044; 0045.
[2] Patent: WO2011/73092, 2011, A1, . Location in patent: Page/Page column 29; 30.
  • 2
  • [ 82980-50-5 ]
  • [ 2031-23-4 ]
References: [1] Monatshefte fuer Chemie, 1956, vol. 87, p. 701,706.
 

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