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116703-26-5

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116703-26-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 116703-26-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,7,0 and 3 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 116703-26:
(8*1)+(7*1)+(6*6)+(5*7)+(4*0)+(3*3)+(2*2)+(1*6)=105
105 % 10 = 5
So 116703-26-5 is a valid CAS Registry Number.

116703-26-5Downstream Products

116703-26-5Relevant articles and documents

Studies in Synthesis of Furocoumarins: Part XXVIII - Synthesis of Difuranocoumarins

Chandratre, Shubhangi P.,Trivedi, K. N.

, p. 1148 - 1150 (2007/10/02)

6,7-Diallyloxy-4-methylcoumarin (I) on Claisen migration gives 8-allyl-9-hydroxy-2,7-dimethyldihydrofuranobenzopyran-5(H)-one (IIa).The structure of IIa has been confirmed by spectral data (UV, PMR) and IIa is found to be identical (m.m.p., co-TLC) with a product synthesised unambiguously starting from 6,7-diacetoxy-4-methylcoumarin.Product IIa on cyclisation with H2SO4 gives a tetrahydrodifurano derivative (III) which on dehydrogenation over 10percent Pd/C furnishes the difurano derivative (IV).Structures of all these compounds have been confirmed by their PMR spectra.

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