
CAS 3543-74-6
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Category:Chemical Additives MOQ:100KG Shipped directly from China
Introduction
Molecular Formula: C18H27N3O4
Molecular Weight: 349.428
CAS No.: 3543-74-6
Name | [1-Methyl-5-bis(2′-hydroxyethyl)aminobenzimidazolyl-2]butanoic Acid Ethyl Ester |
Synonyms | Bendamustine Related Impurity 1 ethyl 4-{5-[bis(2-hydroxyethyl)amino]-1-methyl-1H-benzimidazol-2-yl}butanoate 5-[Bis(2-hydroxyethyl)aMino]-1-Methyl-2-benziMidazolebutyric Acid Ethyl Ester [1-Methyl-5-bis(2′-hydroxyethyl)aminobenzimidazolyl-2]butanoic Acid Ethyl Ester ethyl 4-{5-[bis(2-hydroxyethyl)aMino]-1-Methyl-1H-1,3-benzodiazol-2-yl}butanoate Ethyl-4-(5-(bis(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanoate 5-[Bis(2-hydroxyethyl)amino]-1-methyl-1H-benzimidazole-2-butanoic acid ethyl ester 4-[5-[Bis(2-hydroxyethyl)aMino]-1-MethylbenziMidazol-2-yl]butanoic acid ethyl ester 1H-Benzimidazole-2-butanoicacid, 5-[bis(2-hydroxyethyl)amino]-1-methyl-, ethyl ester 4-{5-[Bis-(2-hydroxy-ethyl)-amino]-1-methyl-1H-benzoimidazol-2-yl}-butyric acidethylester 4-{5-[bis-(2-hydroxy-ethyl)-amino]-1-methyl-1H-benzoimidazol-2-yl}-butyric acid ethyl ester |
Physico-chemical Properties
Molecular Formula | C18H27N3O4 |
Molar Mass | 349.42 |
Density | 1.21±0.1 g/cm3(Predicted) |
Melting Point | 98-101°C |
Boling Point | 580.6±50.0 °C(Predicted) |
Flash Point | 305°C |
Solubility | Chloroform (Slightly), Methanol (Slightly) |
Vapor Presure | 2.53E-14mmHg at 25°C |
Appearance | Solid |
Color | White to Brown |
pKa | 14.26±0.10(Predicted) |
Storage Condition | Sealed in dry,Store in freezer, under -20°C |
Refractive Index | 1.572 |
Risk and Safety
HS Code | 2933998350 |
Reference Information
Introduction | 5-[bis (2-hydroxyethyl) amino]-1-methyl-1H-benzimidazole-2-butyrate Ethyl ethyl ester is also called 4-{5-bis-(2-hydroxyethyl) amino]-1-methyl-2-benzimidazole} methyl butyrate, which is an intermediate for the synthesis of bendamustine hydrochloride. Bendamustine hydrochloride (BendamustineHydrochloride) was first developed by Ozegowski and his colleagues in the Microbial Experimental Association in Jena, Germany in the early 1960s. The original purpose was to connect an alkylated nitrogen mustard to a purine and amino acid. |
preparation | 5g(0.0202mol) of methyl 5-amino -1-methyl -1H-2-benzimidazole butyrate, 60ml of glacial acetic acid and 60ml of water were sequentially added to a 500ml three-mouth round bottom flask, cooled to 0 ℃, added 2.6ml(0.0521mol) of ethylene oxide, deicing bath, and naturally heated to room temperature for 10 hours. After the reaction is completed, add 50ml dichloromethane, slowly add 20g of sodium carbonate, stir for 1 hour, filter, and dry the filtrate with anhydrous sodium sulfate for 8 hours. Filtration, concentration under reduced pressure until no fraction is produced, 50ml of dichloromethane is added, stirred, filtered, and the solid is blasted and dried at 50 ℃ for 8 hours to obtain 5.8g of white-like solid, molar yield: 85.5%,HPLC:94.6%. |
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