17662-84-9 Usage
Description
D-Valine benzy ester 4-methylbenzenesulfonate, also known as D-Valine benzyl ester p-toluenesulfonate, is a crystalline chemical compound that serves as a crucial reactant and reagent in the pharmaceutical industry. It is primarily used in the synthesis of aspartic acid protease inhibitors and plays a significant role in the development of anti-hepatitis C agents.
Uses
Used in Pharmaceutical Industry:
D-Valine benzy ester 4-methylbenzenesulfonate is used as a reactant for the synthesis of aspartic acid protease inhibitors, which are essential in the development of various therapeutic agents. These inhibitors play a vital role in modulating the activity of aspartic acid proteases, which are involved in numerous biological processes and diseases.
Additionally, D-Valine benzy ester 4-methylbenzenesulfonate is used as an important reagent in the synthesis of anti-hepatitis C agents. Hepatitis C is a viral infection that affects the liver and can lead to severe health complications. The development of effective anti-hepatitis C agents is crucial for treating and managing this disease.
Check Digit Verification of cas no
The CAS Registry Mumber 17662-84-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,6,6 and 2 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 17662-84:
(7*1)+(6*7)+(5*6)+(4*6)+(3*2)+(2*8)+(1*4)=129
129 % 10 = 9
So 17662-84-9 is a valid CAS Registry Number.
InChI:InChI=1/C12H17NO2.C7H8O3S/c1-9(2)11(13)12(14)15-8-10-6-4-3-5-7-10;1-6-2-4-7(5-3-6)11(8,9)10/h3-7,9,11H,8,13H2,1-2H3;2-5H,1H3,(H,8,9,10)/t11-;/m1./s1
17662-84-9Relevant articles and documents
Enantiomeric resolution of p-toluenesulfonate of valine benzyl ester by preferential crystallizaion
Munegumi, Toratane,Wakatsuki, Aiko,Takahashi, Yutaro
experimental part, p. 188 - 192 (2012/03/27)
Preferential crystallization of amino acid derivatives by seeding a pure enantiomer into racemic amino acid solutions has been studied for many years. However, few examples of valine derivatives have been reported so far. Although there have been some reports using valine hydrogen chloride with preferential crystallization, it is difficult to obtain optical isomers for valine derivatives using preferential crystallization. In this study, repeated preferential crystallization of p-toluenesulfonate valine benzyl ester with a 20% e.e. in 2-propanol gave a 94% e.e. on sonication. Sonication accelerated crystallization rate, but there was not a big difference in e.e. between with and without sonication. However, this research demonstrates the first preferential crystallization of p-toluenesulfonate of valine benzyl esters with an acceleration of crystallization using sonication.