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40685-26-5

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40685-26-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40685-26-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,6,8 and 5 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 40685-26:
(7*4)+(6*0)+(5*6)+(4*8)+(3*5)+(2*2)+(1*6)=115
115 % 10 = 5
So 40685-26-5 is a valid CAS Registry Number.

40685-26-5Relevant articles and documents

Arylboronic Acid Catalyzed Dehydrative Mono-/Dialkylation Reactions of β-Ketoacids and Alcohols

Feng, Juhua,Hu, Haipeng,Ni, Hailiang,Qiu, Yuqian,Wang, Cuilin,Wang, Guangtu,Wang, Hanguang,Wang, Wei,Wu, Xin,Yue, Guizhou,Zou, Ping

supporting information, p. 832 - 836 (2022/02/05)

The dehydrative mono-/dialkylation reactions of alcohols and β-ketoacids were realized under arylboronic acid catalysis, furnishing a series of β-aryl ketones and β-ketoesters in yields of 15–99%, with CO2 and H2O being the byproduct

SYNTHESIS OF INDENES FROM PHENYLPROPANONES USING ALUMINA CATALYST

Jayamani, M.,Pant, Nalin,Ananthan, S.,Narayanan, K.,Pillai, C. N.

, p. 4325 - 4332 (2007/10/02)

1,3-Diphenylpropan-2-one undergoes dehydration over alumina at around 400 deg C to form 1,3-diphenylallene which cyclizes to 2-phenylindene.Since the parent ketone can be obtained under the reaction conditions from phenylacetic acid, the present reaction forms a one step syntheses of 2-phenylindene from phenylacetic acid. 3- and 4-methylphenylacetic acids also give the corresponding indenes. 1,3-Diphenylpropan-1-ones also give phenylindenes, presumably by a direct cyclodehydration reaction.

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