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169772-26-3

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169772-26-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169772-26-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,7,7 and 2 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 169772-26:
(8*1)+(7*6)+(6*9)+(5*7)+(4*7)+(3*2)+(2*2)+(1*6)=183
183 % 10 = 3
So 169772-26-3 is a valid CAS Registry Number.

169772-26-3Relevant articles and documents

Application of High-Throughput Competition Experiments in the Development of Aspartate-Directed Site-Selective Modification of Tyrosine Residues in Peptides

Chinn, Alex J.,Hwang, Jaeyeon,Kim, Byoungmoo,Parish, Craig A.,Krska, Shane W.,Miller, Scott J.

, p. 9424 - 9433 (2020)

Herein we report a Cu-catalyzed, site-selective functionalization of peptides that employs an aspartic acid (Asp) as a native directing motif, which directs the site of O-arylation at a proximal tyrosine (Tyr) residue. Through a series of competition studies conducted in high-throughput reaction arrays, effective conditions were identified that gave high selectivity for the proximal Tyr in Asp-directed Tyr modification. Good levels of site-selectivity were achieved in the O-arylation at a proximal Tyr residue in a number of cases, including a peptide-small molecule hybrid.

Reactivity of Carbamoyl Radicals. A New, General, Convenient Free-Radical Synthesis of Isocyanates from Monoamides of Oxalic Acid

Minisci, Francesco,Fontana, Francesca,Coppa, Fausta,Yan, Yong Ming

, p. 5430 - 5433 (2007/10/02)

A new, general, simple synthesis of isocyanates was developed by oxidation of monoamides of oxalix acid with peroxydisulfate catalyzed by Ag and Cu salts.The reaction was carried out in a two-phase system (water and an organic solvent), and it is suitable also for practical applications, due to the simple experimental conditions and the inexpensive as well as nontoxic reagents.The first example of homolytic intramolecular aromatic carbamoylation is also reported.

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