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1231755-75-1

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1231755-75-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1231755-75-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,1,7,5 and 5 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1231755-75:
(9*1)+(8*2)+(7*3)+(6*1)+(5*7)+(4*5)+(3*5)+(2*7)+(1*5)=141
141 % 10 = 1
So 1231755-75-1 is a valid CAS Registry Number.

1231755-75-1Relevant articles and documents

Room-temperature, ligand- and base-free heck reactions of aryl diazonium salts at low palladium loading: Sustainable preparation of substituted stilbene derivatives

Felpin, Francois-Xavier,Miqueu, Karinne,Sotiropoulos, Jean-Marc,Fouquet, Eric,Ibarguren, Oier,Laudien, Julia

experimental part, p. 5191 - 5204 (2010/08/20)

The Pd(OAc)2-catalyzed Heck reaction of aryl diazonium salts with 2-arylacrylates led to cis-stilbenes with good to excellent stereoselectivity. The environmentally friendly protocol developed in this work features low palladium loading in technical-grade methanol at room temperature under base-, additive-, and ligand-free condi-tions. The same protocol applied to simple Heck coupling of aryl diazonium salts with methyl acrylate allows as-tonishingly low palladium loading, down to 0.005 mol %. The stereoselectivity experimentally observed for the synthesis of cis-stilbenes has been rationalized by DFT calculations. Moreover, the role of methanol in promoting the reaction has been clarified by a computational study.

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