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69193-11-9

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69193-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 69193-11-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,1,9 and 3 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 69193-11:
(7*6)+(6*9)+(5*1)+(4*9)+(3*3)+(2*1)+(1*1)=149
149 % 10 = 9
So 69193-11-9 is a valid CAS Registry Number.

69193-11-9Relevant articles and documents

Kinetically controlled peptide synthesis mediated by papain using the carbamoylmethyl ester as an acyl donor

Miyazawa, Toshifumi,Horimoto, Takao,Tanaka, Kayoko

, p. 371 - 376 (2014/08/18)

A series of dipeptides were synthesized generally in good yields with carbamoylmethyl (Cam) esters as acyl donors in the presence of a cysteine protease, papain, immobilized on Celite. Several segment condensations were also achieved generally in high yields without danger of racemization and formation of the secondary-hydrolysis product. Moreover, partial sequences of some bioactive peptides were prepared through segment condensations, and aimed-at peptides were obtained generally in high yields without the racemization of C-terminal residues of the carboxyl components. Thus, the superiority of the Cam ester in the kinetically controlled peptide synthesis was once again ascertained in couplings mediated by the cysteine protease as in those catalyzed by the serine proteases reported earlier.

Pronase catalysed peptide syntheses

Lobell, Mario,Schneider, Manfred P.

, p. 319 - 325 (2007/10/03)

A mixture of proteases from Streptomyces griseus (pronase), displaying a very broad substrate tolerance in the hydrolysis of peptides, has been studied for the first time systematically regarding their substrate specificity in peptide synthesis. It is demonstrated that pronase can be employed successfully for the formation of dipeptides with yields up to 95%. Pronase has also been employed successfully as catalyst for the enzyme assisted synthesis of a hexapeptide.

Benzotriazole-assisted Synthesis of α-Acylaminonitriles and a Conceptually Novel Method for Peptide Elongation

Katritzky, Alan R.,Urogdi, Laszlo

, p. 1853 - 1857 (2007/10/02)

A general method for the synthesis of α-acylamino nitriles is reported.Initially, the adducts resulting from Mannich-type condensation of benzotriazole with an aldehyde and an amide are prepared.These undergo elimination of benzotriazole with cyanide to g

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