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52072-24-9

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52072-24-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52072-24-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,0,7 and 2 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 52072-24:
(7*5)+(6*2)+(5*0)+(4*7)+(3*2)+(2*2)+(1*4)=89
89 % 10 = 9
So 52072-24-9 is a valid CAS Registry Number.

52072-24-9Relevant articles and documents

A phosphine-catalyzed regioselective [3+2] cycloaddition of ethyl 5,5-Diarylpenta-2,3,4-trienoate with aromatic aldehydes and α,β-unsaturated carbonyl compounds

Wang, Lu-Feng,Cao, Xiao-Ping,Shi, Zi-Fa,An, Peng,Chow, Hak-Fun

, p. 3383 - 3390 (2015/02/02)

Tributylphosphine-catalyzed regioselective [3+2] cycloadditions between ethyl 5,5-diarylpenta- 2,3,4-trienoate 1 and various aromatic aldehydes 2 to produce a wide variety of polysubstituted 2,5-dihydrofurans 3, and between 1 and β-unsubstituted α,β-unsat

Phosphine-mediated [3+2] cycloaddition reactions of ethyl 5,5-diarylpenta-2,3,4-trienoates with arylmethylidenemalononitriles and N-tosylimines

Guan, Xiao-Yang,Shi, Min

supporting information; scheme or table, p. 1977 - 1981 (2009/07/01)

Ethyl 5,5-diarylpenta-2,3,4-trienoates were synthesized and utilized in the phosphine-mediated [3+2] cycloaddition reactions with arylmethyhdenemalononitriles and N-tosylimines in the presence of tributylphosphine. These reactions provide an easy access t

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