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221318-25-8

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221318-25-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221318-25-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,1 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 221318-25:
(8*2)+(7*2)+(6*1)+(5*3)+(4*1)+(3*8)+(2*2)+(1*5)=88
88 % 10 = 8
So 221318-25-8 is a valid CAS Registry Number.

221318-25-8Relevant articles and documents

Polycondensed heterocycles. X. A new method for the preparation of pyrrolo[2,1-c][1,4]benzothiazepines by intramolecular Mitsunobu cyclisation

Garofalo, Antonio,Campiani, Giuseppe,Fiorini, Isabella,Nacci, Vito

, p. 1479 - 1490 (2007/10/03)

A modified Mitsunobu reaction of 2-hydroxymethylpyrrole and suitable thiophenol derivatives lead to intermediates which can be easily elaborated and eventually cyclised to the title compounds. The cyclisation step consists of another Mitsunobu reaction variation by which an 'activated' pyrrole is N- alkylated intramolecularly, under very mild conditions.

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