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90664-24-7

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90664-24-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90664-24-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,6,6 and 4 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 90664-24:
(7*9)+(6*0)+(5*6)+(4*6)+(3*4)+(2*2)+(1*4)=137
137 % 10 = 7
So 90664-24-7 is a valid CAS Registry Number.

90664-24-7Relevant articles and documents

A Practical Method for the Preparation of 2-Arylbenzofurans and the Synthesis of Moracin A and B

Vu, Binh,Mezey-Vandor, Gabriella,Nogradi, Mihaly

, p. 734 - 741 (2007/10/02)

Oxidative rearrangement of 2-benzyloxychalcones 2 with Tl(NO3)3 in methanol to 1,2-diaryl-3,3-dimethoxy-1-propanones 3, alkaline degradation to aryl 2-benzyloxybenzyl ketones 4, debenzylation, and ring closure gave 2-arylbenzofurans 1.In this way moracin A and B (1a, b), further 2-(2,4-dihydroxyphenyl)-5,6-dimethoxybenzofuran (1c) were synthesized.The latter was not identical with a substance isolated from Myroxylon balsamum for which structure 1c was claimed.

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