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138963-17-4

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138963-17-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138963-17-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,9,6 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 138963-17:
(8*1)+(7*3)+(6*8)+(5*9)+(4*6)+(3*3)+(2*1)+(1*7)=164
164 % 10 = 4
So 138963-17-4 is a valid CAS Registry Number.

138963-17-4Relevant articles and documents

Glycosylidene Carbenes Part 5 Synthesis of Glycono-1,5-lactone Tosylhydrazones as Precursors of Glycosylidene Carbenes

Mangholz, Sissi E.,Vasella, Andrea

, p. 2100 - 2111 (2007/10/02)

The benzyl- and the acyl-protected glyconolactone tosylhydrazones 6, 9, 12, 16, and 19 (Scheme 1) were prepared in good yields by treating the hemiacetals 4, 7, 10, 14, and 17 with N-tosylhydrazine, to give the N-glycosylhydrazines 5, 8, 11, 15, and 18, a

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