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2688-91-7

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2688-91-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2688-91-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,8 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2688-91:
(6*2)+(5*6)+(4*8)+(3*8)+(2*9)+(1*1)=117
117 % 10 = 7
So 2688-91-7 is a valid CAS Registry Number.

2688-91-7Relevant articles and documents

Synthesis of Cycloheptatrienes, Oxepines, Thiepines, and Silepines: A Comparison between Br?nsted Acid and Au-Catalysis

Alcarazo, Manuel,Golz, Christopher,Sprenger, Kristin

, p. 6245 - 6254 (2020)

The cyclization of 1-(benzyl-, oxyaryl-, thioaryl-, and silaaryl)-2-ethynylbenzenes under Br?nsted acid- and Au(I)-catalysis is described. Br?nsted acid catalysis favors without exception the formation of the products derived from the regioselective proto

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