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20449-20-1

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20449-20-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20449-20-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,4 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20449-20:
(7*2)+(6*0)+(5*4)+(4*4)+(3*9)+(2*2)+(1*0)=81
81 % 10 = 1
So 20449-20-1 is a valid CAS Registry Number.

20449-20-1Relevant articles and documents

Palladium-catalyzed three-component tandem cyclization reaction of 2-(2,3-allenyl)acylacetates, organic halides, and amines: An effective protocol for the synthesis of 4,5-dihydro-1H-pyrrole derivatives

Cheng, Jiajia,Jiang, Xuefeng,Zhu, Can,Ma, Shengming

supporting information; experimental part, p. 1676 - 1682 (2011/09/14)

A domino three-component reaction of 2-(2′,3′-allenyl) acylacetates with aryl or alkenyl halides and aryl- or benzylamines afforded 4,5-dihydro-1H-pyrrole derivatives highly chemo- and regioselectively in one pot through imine formation/imine-enamine taut

Furanosides and Furanones Bearing Acrylate Sidechains via Palladium-Mediated Cyclizations of γ-Oxoallenes

Walkup, Robert D.,Mosher, Michael D.

, p. 9285 - 9294 (2007/10/02)

Treatment of 4,5-hexadienal with catalytic palladium(II) chloride and excess copper(II) chloride, methanol and carbon monoxide in the presence of an acid and a water scavenger resulted in a net acetalization-cyclization-methoxycarbonylation to form a nove

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