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109638-21-3

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109638-21-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109638-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,6,3 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109638-21:
(8*1)+(7*0)+(6*9)+(5*6)+(4*3)+(3*8)+(2*2)+(1*1)=133
133 % 10 = 3
So 109638-21-3 is a valid CAS Registry Number.

109638-21-3Relevant articles and documents

Consecutive and Parallel Rearrangements of 2-Azabicyclooctane Derivatives

Bussmann, Reinhard,Heesing, Albert

, p. 1767 - 1782 (2007/10/02)

Derivatives of both 2-azabicyclooct-5-ene and -octane bearing electronegative substituents on nitrogen show several types of rearrangements: 1) Ring closure to the aziridine derivative 14. 2) Consecutive rearrangement of 14 to 6-azabicyclooctanes 15. 3) Rearrangement to 1-azabicyclooct-2-ene 17 and -oct-6-ene systems 19. 4) Oxygen elimination from O-acylhydroxylamines to the corresponding amides (e.g. 12c -> 13c).We have examined these rearrangements especially with the help of 18O labelled educts and MINDO/3 calculations.They occur mostly via ion pairs of different types.The intermediacy of nitrenium ions was excluded.

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