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213991-35-6

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213991-35-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213991-35-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,9,9 and 1 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 213991-35:
(8*2)+(7*1)+(6*3)+(5*9)+(4*9)+(3*1)+(2*3)+(1*5)=136
136 % 10 = 6
So 213991-35-6 is a valid CAS Registry Number.

213991-35-6Upstream product

213991-35-6Downstream Products

213991-35-6Relevant articles and documents

A one-pot synthesis of new macrocyclic compounds with tetraaminoethene substructure

Wenzel, Matthias,Beckert, Rainer,Guenther, Wolfgang,Goerls, Helmar

, p. 1803 - 1810 (2007/10/03)

A convienent one-pot synthesis of macrocycles containing a tetraaminoethene substructure is described. Starting from oxalic amidines 1, reduction with lithium and subsequent addition of phenyl isothiocyanate afforded the anionic bis(thiocarbamoyl) derivatives 3. In the final step, a ring-closure reaction using a large number of α,ω-dielectrophilic building blocks yields the new macrocyclic compounds 6-14.

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