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99558-25-5

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99558-25-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99558-25-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,5 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 99558-25:
(7*9)+(6*9)+(5*5)+(4*5)+(3*8)+(2*2)+(1*5)=195
195 % 10 = 5
So 99558-25-5 is a valid CAS Registry Number.

99558-25-5Relevant articles and documents

6-exo-trig Michael addition-lactonizations for catalytic enantioselective chromenone synthesis

Neyyappadath, Rifahath M.,Cordes, David B.,Slawin, Alexandra M. Z.,Smith, Andrew D.

, p. 2555 - 2558 (2017/03/09)

The catalytic enantioselective 6-exo-trig Michael addition-lactonization of enone-acid substrates to form cis-chromenones with high diastereo- and enantiocontrol was developed using the commercially available isothiourea tetramisole. An acidic workup prov

The 2-(allyloxy) phenyl acetyl ester as a new relay protecting group for oligosaccharide synthesis

Arranz, Esther,Boons, Geert-Jan

, p. 6469 - 6471 (2007/10/03)

The 2-(allyloxy) phenyl acetyl group can be removed by a relay approach using Pd(PPh3)4 in combination with proton sponge, conditions that do not affect acetyl, benzoyl and levulinoyl esters. On the other hand, the acetyl and levulin

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