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7-(3,4-dimethoxy-phenyl)-2,2-dimethyl-2H-pyrano[4,3-b]pyran-5-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

220633-48-7

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220633-48-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220633-48-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,6,3 and 3 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 220633-48:
(8*2)+(7*2)+(6*0)+(5*6)+(4*3)+(3*3)+(2*4)+(1*8)=97
97 % 10 = 7
So 220633-48-7 is a valid CAS Registry Number.

220633-48-7Downstream Products

220633-48-7Relevant academic research and scientific papers

A formal [3 + 3] cycloaddition reaction. Improved reactivity using α,β-unsaturated iminium salts and evidence for reversibility of 6π-electron electrocyclic ring closure of 1-oxatrienes

Shen, Hong C.,Wang, Jiashi,Cole, Kevin P.,McLaughlin, Michael J.,Morgan, Christopher D.,Douglas, Christopher J.,Hsung, Richard P.,Coverdale, Heather A.,Gerasyuto, Aleksey I.,Hahn, Juliet M.,Liu, Jia,Sklenicka, Heather M.,Wei, Lin-Li,Zehnder, Luke R.,Zificsak, Craig A.

, p. 1729 - 1735 (2003)

A detailed account regarding a formal [3 + 3] cycloaddition method using 4-hydroxy-2-pyrones and 1,3-diketones is described here. This formal cycloaddition reaction or annulation reaction is synthetically useful for constructing 2H-pyranyl heterocycles. T

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