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81640-25-7

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81640-25-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81640-25-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,4 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81640-25:
(7*8)+(6*1)+(5*6)+(4*4)+(3*0)+(2*2)+(1*5)=117
117 % 10 = 7
So 81640-25-7 is a valid CAS Registry Number.

81640-25-7Downstream Products

81640-25-7Relevant articles and documents

Rearrangement with Oxygen-Insertion in Azabicyclic Hydroxylamine Derivatives

Heesing, Albert,Herdering, Wilhelm,Henkel, Gerald,Krebs, Bernt

, p. 1107 - 1117 (2007/10/02)

N-Hydroxy-2-azabicyclohept-5-ene (1) is rearranged to the oxaazabicyclic compounds 3,4, and 8 by the reaction with either tosyl or benzoyl chloride.The structure of 3 was proved by X-ray analysis.Experiments with tosyl chloride as well product

SAUERSTOFF-INSERTION BEI DER UMLAGERUNG VON 2-AZA-BICYCLOHEPT-2-EN-DERIVATEN

Heesing, A.,Herdering, W.

, p. 4675 - 4678 (2007/10/02)

N-Acyclation of N-hydroxy-2-azabicyclohept-2-ene causes rearrangement to oxa-aza-bicycles (7, 8) by insertion of the hydroxalamine oxygen into the heterocyclic system.The mechanism is elucidated.

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