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404338-74-5

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404338-74-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 404338-74-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,4,3,3 and 8 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 404338-74:
(8*4)+(7*0)+(6*4)+(5*3)+(4*3)+(3*8)+(2*7)+(1*4)=125
125 % 10 = 5
So 404338-74-5 is a valid CAS Registry Number.

404338-74-5Relevant articles and documents

Synthesis of two alnustone-like natural diarylheptanoids via 4+3 strategy

Burmaoglu, Serdar,Celik, Huelya,Goeiksu, Sueleyman,Maras, Ahmet,Altundas, Ramazan,Secen, Hasan

experimental part, p. 1549 - 1562 (2009/11/30)

The first total synthesis of (4E,6E)-1,7-bis(3,4-dihydroxyphenyl)-hepta-4, 6-dien-3-one and an alternative synthesis of (4E,6E)-1,7-bis(4-hydroxyphenyl)- hepta-4,6-dien-3-one, two natural diarylheptanoids, mainly based on Claisen-Schmidt condensation were described. The crucial steps of the syntheses were the condensation of OH-protected 4-aryl-2-butanones with OH-protected 3-aryl-acrylaldehydes by the in situ enamination and then deprotection of OH groups to give the corresponding natural diarylheptanoids. Copyright Taylor & Francis Group, LLC.

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