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99503-06-7

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99503-06-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99503-06-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,0 and 3 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 99503-06:
(7*9)+(6*9)+(5*5)+(4*0)+(3*3)+(2*0)+(1*6)=157
157 % 10 = 7
So 99503-06-7 is a valid CAS Registry Number.

99503-06-7Relevant articles and documents

5-Norbornene-2,3-dicarboximido Carbonochloridate. A New Stable Reagent for the Introduction of Amino-Protecting Groups

Henklein, Peter,Heyne, Hans-Ulrich,Halatsch, Wolf-Rainer,Niedrich, Hartmut

, p. 166 - 167 (1987)

The synthesis of activated carbonates, based on a new carbonochloridate derived from N-hydroxy-5-norbornene-2,3-dicarboximide, is reported.These activated carbonic esters are excellent reagents for the introduction of all currently used urethane protecting groups.

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