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189574-20-7

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189574-20-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189574-20-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,5,7 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 189574-20:
(8*1)+(7*8)+(6*9)+(5*5)+(4*7)+(3*4)+(2*2)+(1*0)=187
187 % 10 = 7
So 189574-20-7 is a valid CAS Registry Number.

189574-20-7Relevant articles and documents

Efficient synthetic method for L-tartaramides by aminolysis of reactive 2,3-O-isopropylidene-L-tartaryl chloride

Choi, Heung-Jin,Kwak, Mi-Ok,Song, Hanchul

, p. 1273 - 1280 (1997)

The reactive 2,3-O-isopropylidene L-tartaryl chloride 4 was firstly synthesized from L-(+)-tartaric acid. Various chiral 2,3-O-isopropylidene-L-tartaramides 5 were prepared by aminolysis of the reactive L-tartaryl chloride 4 with primary and secondary ami

Fluorescence screening of tartaric acid-derived azamacrocycles synthesized via sequential hydroformylation/reductive amination as potential ligands for asymmetric catalysis

Angelovski, Goran,Keraenen, Mark D.,Eilbracht, Peter

, p. 1919 - 1926 (2007/10/03)

Azamacrocycles containing a tartaric acid-derived unit and aryl units were synthesized via rhodium-catalyzed hydroformylation while the subsequent reductive amination was carried out in a tandem or stepwise fashion. Upon fluorescence emission experiments,

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