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176502-70-8

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176502-70-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 176502-70-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,5,0 and 2 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 176502-70:
(8*1)+(7*7)+(6*6)+(5*5)+(4*0)+(3*2)+(2*7)+(1*0)=138
138 % 10 = 8
So 176502-70-8 is a valid CAS Registry Number.

176502-70-8Relevant articles and documents

Microwave-enhanced solid-phase synthesis of N,N′-linked aliphatic oligoureas and related hybrids

Douat-Casassus, Céline,Pulka, Karolina,Claudon, Paul,Guichard, Gilles

supporting information; experimental part, p. 3130 - 3133 (2012/09/08)

A practical and efficient microwave-assisted solid-phase method for the synthesis of N,N′-linked oligoureas and related amide/urea hybrid oligomers, featuring the use of succinimidyl (2-azido-2-substituted ethyl) carbamate monomers, is reported. The rate enhancement of urea formation under microwave irradiation combined with the mild conditions of the phosphine-based azide reduction makes this approach very effective for routine synthesis of oligoureas and possibly for library production.

Synthesis of novel N-protected β3-amino nitriles: study of their hydrolysis involving a nitrilase-catalyzed step

Veitia, Maite Sylla-Iyarreta,Brun, Pierre Louis,Jorda, Pierre,Falguieres, Annie,Ferroud, Clotilde

scheme or table, p. 2077 - 2089 (2010/03/04)

Several commercially available nitrilases were investigated with regard to their potential to hydrolyze N-protected β3-amino nitriles into their corresponding N-protected β3-amino acids. The biotransformations were obtained in different proportions depending on the nitrilase involved. The best hydrolysis results were achieved for the N-Cbz-β3-amino nitrile from l-alanine using the NIT-107, in a phosphate buffer at 0.05 M. However, no biotransformation into the corresponding acids was observed for the N-sulfonylamide β3-amino nitriles. Two simple and efficient procedures to prepare the β3-amino nitriles from their analogous α-amino acids are described. Thirty four new substances were synthesized and characterized over the course of this work.

Syntheses of amino alcohols and chiral C2-symmetric bisoxazolines derived from O-alkylated R-4-hydroxyphenylglycine and S-tyrosine

Caplar, Vesna,Raza, Zlata,Katalenic, Darinka,Zinic, Mladen

, p. 23 - 36 (2007/10/03)

Chiral C2-symmetric bisoxazolines 1b-f and 2b,c, derived from 4′-O-alkylated R-4-hydroxyphenylglycine or S-tyrosine, were prepared. As intermediates, a series of chiral amino alcohols possessing substituted phenolic groups was prepared and fully characterized.

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