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Chemical Structure| 109882-25-9 Chemical Structure| 109882-25-9

Structure of 109882-25-9

Chemical Structure| 109882-25-9

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Product Details of [ 109882-25-9 ]

CAS No. :109882-25-9
Formula : C17H23Cl2N3O2
M.W : 372.29
SMILES Code : O=C(OC)CCCC1=NC2=CC(N(CCCl)CCCl)=CC=C2N1C

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Application In Synthesis of [ 109882-25-9 ]

* 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 [ 109882-25-9 ]

[ 109882-25-9 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 3543-75-7 ]
  • [ 109882-25-9 ]
  • 2
  • [ 109882-25-9 ]
  • [ 3543-75-7 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; water; for 4h;Reflux; Example 9; Preparation of Bendamustine hydrochloride: 4- {5-[Bis-(2-chloro-ethyl)-amino]- 1 -methyl- 1H-benzoimidazol-2-yl} -butyric acid methyl ester (10.0 g) and concentrated hydrochloric acid (40 mL) were heated at reflux for 4 hours. The hydrolysis was driven to completion by evaporating 70wt% of the solvent in the reaction mixture at 58 C under reduced pressure. After warm water was added, the resulting mixture was allowed to cool to 0 to 5 C to precipitate the product. Vacuum filtration and washing by cold water and then cold acetone gave an off-white solid (8.6 g, 81%) with a purity of 99.1 Area% (HPLC Method C). The crude product was further treated by refluxing with charcoal in ethanol, filtering while hot, cooled, the crystals collected by filitration, and washed with hot acetone (2-4 times when needed) to increase the purity. 1H NMR (400 MHz, DMSO-d6) delta 12.3 (br s, 1H), 7.72 (d, J= 9.3 Hz, 1H), 7.14 (d, J= 2.3 Hz, 1H), 6.89 (dd, J= 9.3, 2.3 Hz, 1H), 3.90 (s, 3H), 3.80 (m, 8H), 3.14 (t, J= 7.6 Hz, 2H), 2.42 (t, J= 7.2 Hz, 2H) , 2.01 (quint, J= 7.6Hz, 2H); LC/MS (ESI, m/z) 358 (M+l).
With hydrogenchloride; In water; at 25 - 28℃; for 0.25h; b) Preparation Using the Bendamustine Mthyl Ester of Example 1b) as the Starting Material A 500 mL three-necked round bottom flask equipped with a magnetic stirring bar, internal thermometer and a reflux-condenser with oil pressure valve was charged with bendamustine methyl ester (177.93 moist, 92.2 g calc'd. dry, content of dry matter assumed 100%: 248 mmol), hydrochloric acid (37%, 215 mL), and activated charcoal (4.61 g). The suspension was stirred for about 15 min at temperatures of 25 to 28 C., filtered and the residue was washed with hydrochloric acid (37%, 8 mL). The combined aqueous solutions were concentrated under reduced pressure. Yet another flask was charged with water (585 mL), which was warmed up to 41 C. and treated with the concentrate as obtained above with vigorous stirring at 41 C. After the addition was completed, the resulting suspension was cooled to ambient temperature within 13 min. Stirring was continued for a further 60 min and the precipitate was isolated, washed with water (3×45 mL) and optionally additionally with acetone (3×45 mL) to yield the title compound as a colourless solid (86.3 g moist product). Optionally the moist product may be dried at ambient temperature under reduced pressure. HPLC-purity: 99.97% relative area.
  • 3
  • [ 67-56-1 ]
  • [ 3543-75-7 ]
  • [ 109882-25-9 ]
YieldReaction ConditionsOperation in experiment
94% With methanesulfonic acid; at 65℃; for 1h;Inert atmosphere; Method B: To a 2L three-neck glass vessel equipped with a heating mantle, thermocouple, condenser, nitrogen inlet/outlet, and overhead stirrer was charged <strong>[3543-75-7]bendamustine</strong> HC1 (50.0g, 126.7 mmol, 1.0 eq.), methanol (500 mL) , and methanesulfonic acid (2.47 mL, 38.1 mmol). The reaction mixture was heated to reflux and stirred at 65 C for one hour. The reaction solution was cooled to 40 C and concentrated under vacuum. Water (500 mL) was added to the concentrated residue, and a saturated aqueous solution of NaHCC>3 (150 mL) was used to neutralize the mixture to pH 6 over 1.5 hours. The product was collected by filtration, washed with water (150 mL) and dried at 40 C under vacuum, giving a white, powdery solid, 44.2 g (94% yield) with 98.4A% purity by HPLC.
 

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