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160154-75-6

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160154-75-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 160154-75-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,0,1,5 and 4 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 160154-75:
(8*1)+(7*6)+(6*0)+(5*1)+(4*5)+(3*4)+(2*7)+(1*5)=106
106 % 10 = 6
So 160154-75-6 is a valid CAS Registry Number.

160154-75-6Relevant articles and documents

Regioselective synthesis of prenylisoflavones. Syntheses of allolicoisoflavone A, 2,3-dehydrokievitone, and related compounds

Tsukayama, Masao,Li, He,Tsurumoto, Ken,Nishiuchi, Masaki,Kawamura, Yasuhiko

, p. 2673 - 2680 (2007/10/03)

The palladium-catalyzed coupling reaction of 2',4',5,7- tetrakis(benzyloxy)-5'-iodolsoflavone (12), synthesized from the 5- iodochalcone 9, with 2-methyl-3-butyn-2-ol gave the corresponding 5'-(3- hydroxy-3-methyl-1-butynyl)isoflavone 13. The catalytic hydrogenation of 13 gave 2',4',5,7-tetrahydroxy-5'-(3-hydroxy-3-methylbutyl)isoflavone (2). Dehydration of the benzoate 14 of 2 afforded a mixture of 5'-(3-methyl-2- butenyl)isoflavone 15 and the isomer 5'-(3-methyl-3-butenyl)isoflavone 16. The separation of 15 was accomplished by a treatment of the mixture (15 and 16) with mercury(II) nitrate. Hydrolysis of 15 afforded 2',4',5,7- tetrahydroxy-5'-prenylisoflavone (allolicoisoflavone A) (1). In a similar manner, 2',4',5,7-tetrahydroxy-8-prenylisoflavone (2,3-dehydrokievitone) (3) and 2',4',5,7-tetrahydroxy-8-(3-hydroxy-3-methylbutyl)isoflavone (2,3- dehydrokievitone hydrate) (4) were synthesized from the corresponding 8- iodoisoflavone 22. The tetramethyl ether 5 of 3 was also prepared from the 8- iodotetramethoxyisoflavone 32.

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