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100994-20-5

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100994-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 100994-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,0,9,9 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 100994-20:
(8*1)+(7*0)+(6*0)+(5*9)+(4*9)+(3*4)+(2*2)+(1*0)=105
105 % 10 = 5
So 100994-20-5 is a valid CAS Registry Number.

100994-20-5Downstream Products

100994-20-5Relevant articles and documents

Synthesis of Heterophanes Containing the Pyridine, Furan, and Thiophene Rings by the TosMIC Method

Shinmyozu, Teruo,Hirai, Yoshio,Inazu, Takahiko

, p. 1551 - 1555 (2007/10/02)

(2,5)- and (2,6)pyridinophanes as well as metacyclo(2,5)furanophane (20) and metacyclo(2,5)thiophenophane (23) have been synthesized by the conventional or modified TosMIC coupling reaction, followed by acid treatment and reduction. 1H NMR data suggest that the stable conformation of the metacyclophane-2,11-dione system (3,6,19, and 22) is anti, whereas that of the metacyclophane system (4, 7, 20, and 23) is syn.In (2,5)pyridinophanes (17a-d) the average deshielding effects for protons located pseudogeminal and pseudoortho to a nitrogen atom are found to be 0.28 and 0.15 ppm, respectively, as compared to those pseudopara to the nitrogen.

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