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98750-87-9

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98750-87-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98750-87-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,7,5 and 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 98750-87:
(7*9)+(6*8)+(5*7)+(4*5)+(3*0)+(2*8)+(1*7)=189
189 % 10 = 9
So 98750-87-9 is a valid CAS Registry Number.

98750-87-9Downstream Products

98750-87-9Relevant articles and documents

Intramolecular Reactions of N-Nitrenes with Alkynes: Conformational Anchoring in Spiro-fused 2H-Azirines

Atkinson, Robert S.,Grimshire, Michael J.

, p. 1215 - 1224 (2007/10/02)

Oxidations of N-aminoquinazolin-4(3H)-ones (7)-(11) with lead tetra-acetate in dichloromethane results in the intramolecular addition of the N-nitrene to the triple bond in each case and azirines (20), (22), (17), (23), and (30), respectively, are isolated with (31) identified as a by-product in the oxidation of compound (11).An X-ray crystal structure determination on compound (17) reveals a remarkable deformation of bond angles at the spiro centre and this feature appears to be common to all azirines.The five membered ring in the azirines (17), (20), (22), and (23) has the envelope conformation (26) and the six-membered ring in the azirine (30) has the twist-boat conformation (32): a possible explanation for this conformational anchoring is offered.

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