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197906-36-8

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197906-36-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197906-36-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,9,0 and 6 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 197906-36:
(8*1)+(7*9)+(6*7)+(5*9)+(4*0)+(3*6)+(2*3)+(1*6)=188
188 % 10 = 8
So 197906-36-8 is a valid CAS Registry Number.

197906-36-8Downstream Products

197906-36-8Relevant articles and documents

Synthesis of macrocyclic polyhydroxy tetralactams derived from L-tartaric acid and β-hydroxyglutaric acid

Arnaud, Nathalie,Picard, Claude,Cazaux, Louis,Tisnes, Pierre

, p. 13757 - 13768 (2007/10/03)

The synthesis of new 16-, 18-, 19- or 20-membered secondary tetralactams with L-tartaric acid or β-hydroxyglutaric acid moieties is investigated. The stepwise synthesis with an intermediate diamide diamine provides overall good yields (30-55%) compared with other processes using an intermediate diamide diacid or direct macrocyclization. This synthetic pathway leads to symmetrical or unsymmetrical polyhydroxytetralactams with variable hydroxyl group number. Use of mild acylating agents in this approach allows to avoid the protection-deprotection steps of hydroxyl groups.

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