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503590-21-4

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503590-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 503590-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,3,5,9 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 503590-21:
(8*5)+(7*0)+(6*3)+(5*5)+(4*9)+(3*0)+(2*2)+(1*1)=124
124 % 10 = 4
So 503590-21-4 is a valid CAS Registry Number.

503590-21-4Relevant articles and documents

Highly substituted 2-amido-furans from rh(ll)-catalyzed cyclopropenations of ynamides

Li, Hongyan,Hsung, Richard P.

supporting information; experimental part, p. 4462 - 4465 (2009/12/24)

Rh(II)-catalyzed cyclopropenations of ynamides are described. Although an actual amido-cyclopropene intermediate may not be involved, these reactions provide a facile entry to highly substituted 2-amido-furans, thereby formerly constituting a [3 + 2] cycloaddition. An application of these de novo 2-amido-furans In N-tethered intramolecular [4 + 2] cycloadditions is also illustrated, leading to dihydroindoles and tetrahydroqulnolines

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