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1266332-91-5

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1266332-91-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1266332-91-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,6,6,3,3 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1266332-91:
(9*1)+(8*2)+(7*6)+(6*6)+(5*3)+(4*3)+(3*2)+(2*9)+(1*1)=155
155 % 10 = 5
So 1266332-91-5 is a valid CAS Registry Number.

1266332-91-5Downstream Products

1266332-91-5Relevant articles and documents

Efficient synthesis of natural polyphenolic stilbenes: Resveratrol, piceatannol and oxyresveratrol

Sun, Hong-Yi,Xiao, Chun-Fen,Cai, Yu-Chen,Chen, Yu,Wei, Wen,Liu, Xian-Ke,Lv, Ze-Liang,Zou, Yong

experimental part, p. 1492 - 1496 (2010/12/25)

The practical synthesis of important natural polyphenolic stilbenes, including resveratrol, piceatannol and oxyresveratrol, through Perkin methodology is described. Starting from 3,5-dihydoxyacetophenone (1), the common intermediate 3,5-dimethoxyphenylacetic acid (3) can be obtained via methylation and Willgerodt-Kindler reaction. Perkin condensations between (3) and substituted phenylaldehydes 4 furnished E-2,3-diarylacrylic acids 5, followed by decarboxylation in Cu/quinoline giving stilbene intermediates 6 which bear the Z-configuration. Finally, through a simultaneous demethylation/isomerization process in AlI3/CH3CN system, the target compounds 7a-c can be obtained respectively in good to high overall yields. The synthetic method proved to be more concise, trans-specific, mild, economical and commonly applicable.

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