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220117-65-7

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220117-65-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220117-65-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,1 and 7 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 220117-65:
(8*2)+(7*2)+(6*0)+(5*1)+(4*1)+(3*7)+(2*6)+(1*5)=77
77 % 10 = 7
So 220117-65-7 is a valid CAS Registry Number.

220117-65-7Relevant articles and documents

Synthesis and properties of shape-persistent macrocyclic amphiphiles with switchable amphiphilic portions

Hoeger, Sigurd,Meckenstock, Anne-Desiree,Mueller, Sarah

, p. 2423 - 2434 (2007/10/03)

The bidirectional- and convergent-type syntheses of functionalized kinked phenyl-ethynyl oligomers containing ethynyl end groups are described. Key steps in both approaches are the bromo-iodo selectivity of the Hagihara coupling and the possibility to deprotect acetylenes containing different silyl protective groups stepwise. Glaser coupling of the oligomeric bisacetylenes results in the corresponding macrocycles that contain polar and nonpolar side groups in a switchable arrangement.

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