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144945-94-8

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144945-94-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 144945-94-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,9,4 and 5 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 144945-94:
(8*1)+(7*4)+(6*4)+(5*9)+(4*4)+(3*5)+(2*9)+(1*4)=158
158 % 10 = 8
So 144945-94-8 is a valid CAS Registry Number.

144945-94-8Downstream Products

144945-94-8Relevant articles and documents

Synthesis of 6H-Dibenzopyran-6-ones via Dienone-Phenol Rearrangements of Spiro-3'-ones

Hart, David J.,Kim, Adrienne,Krishnamurthy, Ramanarayanan,Merriman, Gregory H.,Waltos, Anne-Marie

, p. 8179 - 8188 (2007/10/02)

A series of spiro-3'-ones were prepared from metallated benzamides and 4,4-dimethoxycyclohexadienone.Rearrangement of these spirodienones under a variety of conditions gave substituted 6H-dibenzopyran-6-ones.Rearrangements in aqueous sulfuric acid gave products of formal O-migration while rearrangements in trifluoroacetic anhydride-trifluoroacetic acid-sulfuric acid usually gave C-migration products.Key Words: dienone-phenol rearrangement; 6H-dibenzopyran-6-one, spiro-3'-one

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