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5756-23-0

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5756-23-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5756-23-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,7,5 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 5756-23:
(6*5)+(5*7)+(4*5)+(3*6)+(2*2)+(1*3)=110
110 % 10 = 0
So 5756-23-0 is a valid CAS Registry Number.

5756-23-0Relevant articles and documents

Synthesis of symmetrical and unsymmetrical triarylpyrylium ions: Via an inverse electron demand Diels-Alder reaction

Fathimath Salfeena,Basavaraja,Ashitha,Kumar, V. Praveen,Varughese, Sunil,Suresh, Cherumuttathu H.,Sasidhar

supporting information, p. 12463 - 12466 (2018/11/20)

BF3·OEt2 mediated inverse electron demand Diels-Alder (IEDDA) reaction of chalcones with aryl acetylenes is reported for the synthesis of symmetrical and unsymmetrical 2,4,6-triarylpyrylium ions. The protocol provides an effective one-pot method for the utilization of readily available simple substrates under mild reaction conditions leading to a diverse array of pyrylium ions in moderately good yield.

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