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491838-16-5

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491838-16-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 491838-16-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,1,8,3 and 8 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 491838-16:
(8*4)+(7*9)+(6*1)+(5*8)+(4*3)+(3*8)+(2*1)+(1*6)=185
185 % 10 = 5
So 491838-16-5 is a valid CAS Registry Number.

491838-16-5Upstream product

491838-16-5Downstream Products

491838-16-5Relevant articles and documents

The Diels-Alder reactivity of (E)-3-phenylsulfonylprop-2-enenitrile, a cyanoacetylene equivalent

Bradley, Pamela J.,Grayson, David H.

, p. 1794 - 1799 (2002)

(E)-3-Phenylsulfonylprop-2-enenitrile undergoes facile Diels-Alder reactions, moderate regioselectivity being observed with several unsymmetrical dienes. Danishefsky's diene and furfuryl alcohol react regioselectively. The cycloadducts formed with cyclopentadiene and with anthracene undergo base-catalysed elimination of benzenesulfinic acid to yield α,β-unsaturated nitriles.

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