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113525-91-0

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113525-91-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113525-91-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,5,2 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 113525-91:
(8*1)+(7*1)+(6*3)+(5*5)+(4*2)+(3*5)+(2*9)+(1*1)=100
100 % 10 = 0
So 113525-91-0 is a valid CAS Registry Number.

113525-91-0Relevant articles and documents

Synthesis and Biological Evaluation of CF3Se-Substituted α-Amino Acid Derivatives

Han, Zhou-Zhou,Dong, Tao,Ming, Xiao-Xia,Kuang, Fu,Zhang, Cheng-Pan

, p. 3177 - 3180 (2021/07/28)

Several CF3Se-substituted α-amino acid derivatives, such as (R)-2-amino-3-((trifluoromethyl)selanyl)propanoates (5 a/6 a), (S)-2-amino-4-((trifluoromethyl)selanyl)butanoates (5 b/6 b), (2R,3R)-2-amino-3-((trifluoromethyl)selanyl)butanoates (5 c/6 c), (R)-2-((S)-2-amino-3-phenylpropanamido)-3-((trifluoromethyl)selanyl)propanoates (11 a/12 a), and (R)-2-(2-aminoacetamido)-3-((trifluoromethyl)selanyl)propanoates (11 b/12 b), were readily synthesized from natural amino acids and [Me4N][SeCF3]. The primary in vitro cytotoxicity assays revealed that compounds 6 a, 11 a and 12 a were more effective cell growth inhibitors than the other tested CF3Se-substituted derivatives towards MCF-7, HCT116, and SK-OV-3 cells, with their IC50 values being less than 10 μM for MCF-7 and HCT116 cells. This study indicated the potentials of CF3Se moiety as a pharmaceutically relevant group in the design and synthesis of novel biologically active molecules.

Synthesis method of aztreonam monocyclic mother nucleus

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Paragraph 0046; 0047, (2019/06/13)

The invention discloses a synthesis method of an aztreonam monocyclic mother nucleus, and mainly relates to the technical field of pharmaceutical and chemical industry. The method comprises the stepsthat L-threonine is subjected to methyl esterification; terbutyloxycarbonyl anhydride is used for performing amino BOC protection; ammonia water is subjected to ammonolysis; under the catalysis of a solid basic catalyst, methyl-sulfuric-acyl reaction and sulfonation are performed; cyclization, deprotection and acidification are performed to obtain the aztreonam monocyclic mother nucleus. The raw materials are cheap and can be easily obtained; the yield is high; the cost is low; the synthesis method belongs to a green, energy-saving and environment-friendly practical technology.

Preparation method of O-methyl-threonine/tyrosine

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Paragraph 0013, (2018/06/21)

The invention relates to a preparation method of O-methyl-threonine/tyrosine. The preparation method mainly overcomes the disadvantages of the existing method that a toxic reagent is volatile, the reagent is dangerous, the steps are long, the yield is low, and the like. The preparation method of the O-methyl-threonine/tyrosine comprises the following steps: N-t-butyloxycarboryl-threonine/tyrosineis catalyzed by sodium hydroxide and reacts with dimethyl sulfate to generate N-t-butyloxycarboryl-O-methyl-threonine/tyrosine, and then t-butyloxycarboryl is removed from the N-t-butyloxycarboryl-O-methyl-threonine/tyrosine through acid substances to obtain the product O-methyl-threonine/tyrosine. The product has important application in the fields of antibiotics and polypeptide drugs.

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