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218787-57-6

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218787-57-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 218787-57-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,7,8 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 218787-57:
(8*2)+(7*1)+(6*8)+(5*7)+(4*8)+(3*7)+(2*5)+(1*7)=176
176 % 10 = 6
So 218787-57-6 is a valid CAS Registry Number.

218787-57-6Downstream Products

218787-57-6Relevant articles and documents

Curtius degradation in solid-phase synthesis

Richter, Lutz S.,Andersen, Stina

, p. 8747 - 8750 (1998)

An optimized and broadly applicable procedure for the solid-phase synthesis of primary amines and carbamates via Curtius-degradation of carboxylic acids has been developed. The targeted primary amines and carbamates were obtained in excellent purity and high overall yields.

An efficient and expeditious Fmoc protection of amines and amino acids in aqueous media

Gawande, Manoj B.,Branco, Paula S.

supporting information; experimental part, p. 3355 - 3359 (2012/01/06)

A new and environmentally friendly Fmoc protection of a variety of aliphatic and aromatic amines, amino acids, amino alcohols and amino phenols is reported in aqueous media under mild and catalyst-free conditions. The reaction proved to be chemoselective in presence of ambident nucleophiles.

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