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440640-39-1

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440640-39-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 440640-39-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,0,6,4 and 0 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 440640-39:
(8*4)+(7*4)+(6*0)+(5*6)+(4*4)+(3*0)+(2*3)+(1*9)=121
121 % 10 = 1
So 440640-39-1 is a valid CAS Registry Number.

440640-39-1Downstream Products

440640-39-1Relevant articles and documents

Photocyclization reactions. Part 8 [1]. Synthesis of 2-quinolone, quinoline and coumarin derivatives using trans-cis isomerization by photoreaction

Horaguchi, Takaaki,Hosokawa, Nobuyuki,Tanemura, Kiyoshi,Suzuki, Tsuneo

, p. 61 - 67 (2002)

2-Quinolone 2, quinoline 3, coumarin (2H-1-benzopyran-2-one) 5, and 2H-1-benzopyran hemiacetal 6 were synthesized by photocyclization reaction of trans-o-aminocinnamoyl derivatives trans-1 and trans-o-hydroxycinnamoyl derivatives trans-4. The reaction proceeds through trans-cis isomerization followed by intramolecular cyclization.

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