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81790-27-4

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81790-27-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81790-27-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,9 and 0 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81790-27:
(7*8)+(6*1)+(5*7)+(4*9)+(3*0)+(2*2)+(1*7)=144
144 % 10 = 4
So 81790-27-4 is a valid CAS Registry Number.

81790-27-4Relevant articles and documents

Synthesis of Racemic Tenellin

Williams, David R.,Sit, Sing-Yuen

, p. 2846 - 2851 (2007/10/02)

Total synthesis of racemic tenellin, a yellow pigment of the insect pathogenic fungus Beauveria, has been accomplished.Preparation of 1,4-dihydroxy-5-(p-hydroxyphenyl)-2(1H)-pyridinone is achieved in excellent overall yield by utilizing an intramolecular C-acylation of an imidazolide precursor.A facile conjugate reduction of the vinylogous amide 6 is illustrated with sodium cyanoborohydride.

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