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954106-37-7

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954106-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 954106-37-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,4,1,0 and 6 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 954106-37:
(8*9)+(7*5)+(6*4)+(5*1)+(4*0)+(3*6)+(2*3)+(1*7)=167
167 % 10 = 7
So 954106-37-7 is a valid CAS Registry Number.

954106-37-7Relevant articles and documents

A study into asymmetric Nicholas cyclisation reactions

Tyrrell, Elizabeth,Millet, Julien,Tesfa, Kibur Hunie,Williams, Neil,Mann, Alastair,Tillett, Caroline,Muller, Christophe

, p. 12769 - 12778 (2007)

Three systematic approaches have been employed to investigate asymmetric Nicholas reactions. We found that the use of a chiral N-enoyl derivative provided acceptable levels of selectivity for an intermolecular Nicholas reaction, however, we were unable to identify an auxiliary that could be utilized in an asymmetric conjugate addition and a tandem inter/intramolecular series of Nicholas reactions. The use of chiral pool non-racemic propargyl alcohols, derived from citronellal, provided enhanced levels of selectivity. As a result of these studies we developed a series of Nicholas cyclisations derived from chiral non-racemic salicylaldehyde derivatives. These underwent an extremely rapid and highly efficient cyclisation, under Nicholas conditions, to afford a range of benzopyrans. The adjacent stereogenic centres appear to be formed with high levels of stereocontrol.

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