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20337-98-8

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20337-98-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20337-98-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,3,3 and 7 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20337-98:
(7*2)+(6*0)+(5*3)+(4*3)+(3*7)+(2*9)+(1*8)=88
88 % 10 = 8
So 20337-98-8 is a valid CAS Registry Number.

20337-98-8Downstream Products

20337-98-8Relevant articles and documents

An efficient synthesis of flavans from salicylaldehyde and acetophenone derivatives

Mazimba, Ofentse,Masesane, Ishmael B.,Majinda, Runner R.

experimental part, p. 6716 - 6718 (2012/01/02)

An efficient total synthesis of flavans from the reactions of salicylaldehyde and acetophenone derivatives is reported. The synthesis involves preparation of chalcones through an aldol reaction followed by reduction of both the double bond and the ketone using NaBH4 and an acetic acid mediated cyclization. Methoxy groups on the aromatic rings did not affect significantly the yields of the procedure.

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