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173542-31-9

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173542-31-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173542-31-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,5,4 and 2 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 173542-31:
(8*1)+(7*7)+(6*3)+(5*5)+(4*4)+(3*2)+(2*3)+(1*1)=129
129 % 10 = 9
So 173542-31-9 is a valid CAS Registry Number.

173542-31-9Downstream Products

173542-31-9Relevant articles and documents

Photocyclization reactions of epoxy nitriles via carbonyl ylides. Formation of spiroketals, spiroethers, and a spirolactone

Kotera,Ishii,Sakamoto

, p. 1621 - 1628 (1995)

Photocyclization reactions (λ = 254 nm) of λ-methyl δ-(4-hydroxybutyl) and δ-(4-hydroxypentyl) α,β-unsaturated γ,δ-epoxy nitriles gave spiroketals and spiroethers diastereoselectively, whereas reaction of δ-(6- hydroxyhexyl) nitrile afforded no cyclization product. In addition, photocyclization of nitrile bearing a carboxyl group in the δ-side-chain afforded spirolactone.

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