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191417-72-8

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191417-72-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191417-72-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,4,1 and 7 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 191417-72:
(8*1)+(7*9)+(6*1)+(5*4)+(4*1)+(3*7)+(2*7)+(1*2)=138
138 % 10 = 8
So 191417-72-8 is a valid CAS Registry Number.

191417-72-8Relevant articles and documents

New ventures in the construction of complex heterocycles: Synthesis of morphine and hasubanan alkaloids

Trauner, Dirk,Porth, Stefanie,Opatz, Till,Bats, Jan W.,Giester, Gerald,Mulzer, Johann

, p. 653 - 664 (1998)

Synthetic approaches to morphine and hasubanan alkaloids involving novel reactions for the formation of their dihydrobenzofuran, piperidine and pyrrolidine ring, respectively, are described. The importance of conformational constraints for the success of these reactions is demonstrated. The syntheses of new dioxepanes, diazepanes, dithiocanes, triazenes and dioxonanes are also reported.

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