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54917-02-1

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54917-02-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54917-02-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,9,1 and 7 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 54917-02:
(7*5)+(6*4)+(5*9)+(4*1)+(3*7)+(2*0)+(1*2)=131
131 % 10 = 1
So 54917-02-1 is a valid CAS Registry Number.

54917-02-1Relevant articles and documents

First Total Synthesis of Original Chalcone–Flavone Dimers as Cissampeloflavone Analogues

Thévenin, Marion,Thoret, Sylviane,Dubois, Jo?lle

supporting information, p. 5843 - 5852 (2018/11/24)

The total synthesis of furoflavones closely related to the natural product cissampeloflavone was explored following different pathways. The involvement of a flavone as a key intermediate proved to be the most efficient way to form the 7-phenyl-5H-furo[3,2-g]chromen-5-one scaffold, and the first example of furoflavone formation was achieved in this way. For the synthesis of chalcone–flavone dimers, two different strategies were examined: either acylation at the very end of the synthesis, or introduction of the 3-acyl group during furan-ring formation. The final acylation was hardly achievable with hindered benzoyl chlorides, but a simpler 4-methoxybenzoyl group was added to the furoflavone in modest yield. The alternative direct introduction of this acyl group during furan formation proved to be more efficient. Conjugate addition of an iodoflavone to an ynone followed by intramolecular Heck cyclization gave the best results, leading to the first synthetic chalcone–flavone dimer ever described.

A Convenient Synthesis of Prenylated Isoflavones: Synthesis of Licoricone and Related Compounds

Tsukayama, Masao,Horie, Tokunaru,Fujimoto, Kunihiro,Nakayama, Mitsuru

, p. 2369 - 2374 (2007/10/02)

The condensation of 6',7-bis(benzoyloxy)-2',4'-dimethoxyisoflavone (18) with 2-methyl-3-buten-2-ol, followed by hydrolysis of the resultant 6',7-bis(benzoyloxy)-2',4'-dimethoxy-3'-(3-methyl-2-butenyl)isoflavone (19) gave 6',7-dihydroxy-2',4'-dimethoxy-3'-(3-methyl-2-butenyl)-isoflavone (licoricone) (1).Its isomer, 6',7-dihydroxy-2',4'-dimethoxy-5'-(3-methyl-2-butenyl)-isoflavone (2), was also synthesized from 7-benzoyloxy-6'-hydroxy- or 6',7-bis(benzoyloxy)-2',4'-dimethoxy-5'-(3-methyl-2-butenyl)isoflavone (11 or 20).Keywords - isoflavone; selective prenylation (3-methyl-2-butenylation); prenylated isoflavone; 6',7-dihydroxy-2',4'-dimethoxy-3'-(3-methyl-2-butenyl)isoflavone (licoricone); 6',7-dihydroxy-2',4-dimethoxy-5'-(3-methyl-2-butenyl)isoflavone; 6-hydroxy-2,4-dimethoxybenzaldehyde

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