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65874-44-4

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65874-44-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 65874-44-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,8,7 and 4 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 65874-44:
(7*6)+(6*5)+(5*8)+(4*7)+(3*4)+(2*4)+(1*4)=164
164 % 10 = 4
So 65874-44-4 is a valid CAS Registry Number.

65874-44-4Relevant articles and documents

Concise Synthesis of Natural Phenylphenalenone Phytoalexins and a Regioisomer

Wang, Ming-Zhong,Ku, Chuen-Fai,Si, Tong-Xu,Tsang, Siu-Wai,Lv, Xiao-Meng,Li, Xiao-Wan,Li, Zheng-Ming,Zhang, Hong-Jie,Chan, Albert S. C.

, p. 98 - 105 (2018)

Concise total syntheses of the natural phytoalexins 2-hydroxy-8-(4-hydroxyphenyl)phenalen-1-one (1), 2-hydroxy-8-(3,4-dihydroxyphenyl)phenalen-1-one (2), and hydroxyanigorufone (4), together with regioisomer 3 are accomplished in 11 or 12 steps. The synthetic strategy features a Friedel-Crafts acylation to construct the 1H-phenalen-1-one tricyclic core followed by a Suzuki cross-coupling to obtain the target compounds.

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