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223511-19-1

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223511-19-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223511-19-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,5,1 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 223511-19:
(8*2)+(7*2)+(6*3)+(5*5)+(4*1)+(3*1)+(2*1)+(1*9)=91
91 % 10 = 1
So 223511-19-1 is a valid CAS Registry Number.

223511-19-1Relevant articles and documents

Synthesis of 1,3-thioxoketones from salicylaldehyde

Semenova,Yarovenko,Levchenko,Krayushkin

, p. 1022 - 1025 (2014/03/21)

A method for the synthesis of monothiodibenzoylmethanes was developed. The method involves a reaction of potassium thioacetate with 1-(2-hydroxyphenyl)-3- phenylpropynone prepared from salicylaldehyde.

Novel synthetic routes suitable for constructing benzopyrone combinatorial libraries

Bhat, Abhijit S.,Whetstone, Jennifer L.,Brueggemeier, Robert W.

, p. 2469 - 2472 (2007/10/03)

A series of O-(t-butylsilyloxy)benzoyl chlorides generated from the corresponding silyl esters were coupled with a range of terminal alkynes to afford the corresponding alkynyl ketones. The alkynyl ketones were converted to enaminoketones and then cyclized to yield the desired benzopyrone ring system. This synthetic protocol utilizes readily available starting materials, mild and high yielding reactions with good functional group tolerance, and is ideal for developing combinatorial libraries centered around the benzopyrone ring system.

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