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158599-29-2

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158599-29-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158599-29-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,5,9 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 158599-29:
(8*1)+(7*5)+(6*8)+(5*5)+(4*9)+(3*9)+(2*2)+(1*9)=192
192 % 10 = 2
So 158599-29-2 is a valid CAS Registry Number.

158599-29-2Relevant articles and documents

Radical-mediated ring enlargement of cyclobutenones: New synthetic potential of squaric acid

Yamamoto, Yoshihiko,Ohno, Masatomi,Eguchi, Shoji

, p. 9653 - 9661 (1995)

4-Hydroxy-2-cyclobutenones, which are readily obtainable from diethyl squarate, reacted with lead tetraacetate to give 5-acetoxy-2(5H)-furanones and 5-alkylidene-2(5H)-furanones via oxy-radical-triggered ring opening (β-scission) and subsequent 5-endo rec

Oxidative Rearrangement of 4-Hydroxy-2-cyclobutenone. A New Route to Highly Substituted Furanones from Squaric Acid

Yamamoto, Yoshihiko,Ohno, Masatomi,Eguchi, Shoji

, p. 4707 - 4709 (2007/10/02)

4-Hydroxy-2-cyclobutenones, which were obtained by the reaction of diethyl squarate with an organolithium, reacted with lead tetraacetate (to generate an oxy radical) affording 5-acetoxy-2(5H)-furanones and 5-alkylidene-2(5H)-furanones.This type of rearrangement was realized in a simple four-membered cyclic α-ketol but not in the corresponding five-membered ring.

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