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85972-28-7

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85972-28-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 85972-28-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,5,9,7 and 2 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 85972-28:
(7*8)+(6*5)+(5*9)+(4*7)+(3*2)+(2*2)+(1*8)=177
177 % 10 = 7
So 85972-28-7 is a valid CAS Registry Number.

85972-28-7Downstream Products

85972-28-7Relevant articles and documents

Preparation and Diels-Alder Reactivity of Several New Chalcogen-Halogen Substituted Butadienes

Bridges, Alexander J.,Fischer, John W.

, p. 2954 - 2961 (2007/10/02)

Addition of halogens and pseudohalogens across one ?-bond of 1,4-dichlorobut-2-yne, followed by a 1,4-elimination, is an efficient synthesis of several new polysubstituted butadienes.If the product dienes have a sulfur or selenium substituent they are quite reactive, undergoing cycloaddition with the moderately reactive dienophile methyl vinyl ketone at 20 deg C in the presence of boron trifluoride etherate.The regiochemistry of the cycloadditions was elucidated, and the limitations of the methodology are discussed.

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