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1-(2-Hydroxy-phenyl)-4-(2-iodo-phenoxy)-butane-1,3-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

203723-14-2

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203723-14-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203723-14-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,7,2 and 3 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 203723-14:
(8*2)+(7*0)+(6*3)+(5*7)+(4*2)+(3*3)+(2*1)+(1*4)=92
92 % 10 = 2
So 203723-14-2 is a valid CAS Registry Number.

203723-14-2Relevant academic research and scientific papers

The oxidative ring expansion of spiro-annulated chroman-4-ones: Syntheses of the rotenoid core and related benzoxanthones

Gabbutt, Christopher D.,Hepworth, John D.,Heron, B. Mark,Thomas, Jean-Luc

, p. 881 - 884 (1998)

Syntheses of dehydrorotenoid and benzoxanthone units from 2'-hydroxyacetophenone are described which feature a novel migration of spiro-substituted chroman-4-ones during their oxidative ring expansion. Conjugate reduction affords a trans B/C fused rotenoid and the related cis and trans fused tetrahydrobenzoxanthones.

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