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88981-33-3

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88981-33-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 88981-33-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,9,8 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 88981-33:
(7*8)+(6*8)+(5*9)+(4*8)+(3*1)+(2*3)+(1*3)=193
193 % 10 = 3
So 88981-33-3 is a valid CAS Registry Number.

88981-33-3Upstream product

88981-33-3Downstream Products

88981-33-3Relevant articles and documents

Synthesis of Peptide Analogues Containing (2-Aminoethyl)phosphonic Acid (Ciliatine)

Yamauchi, Kiyoshi,Ohtsuki, Souichi,Kinoshita, Masayoshi

, p. 1158 - 1163 (1984)

Di- and tripeptide analogues containing (2-aminoethyl)phosphonic acid , which has been discovered in a wide variety of living organisms, were prepared.As starting materials for incorporating the amino phosphonic acid into a peptide chain, the N-phthalylated diethyl ester and the N-carbobenzyloxylated monoalkyl ester were used.A phosphonamide bond between the amino phosphonic acid unit and amino acid unit was formed by reaction of Pht-Aep(OEt)Cl with amino acid ethyl ester or coupling reaction between Cbz-Aep(OR)(OH) and amino acid ethyl ester using diphenylphosphoryl azide-triethylamine as a condensing agent.Removal of the protecting groups was studied in connection with the acid-labile phosphonamide bond in the abnormal peptides.

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