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87223-52-7

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87223-52-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87223-52-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,2,2 and 3 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 87223-52:
(7*8)+(6*7)+(5*2)+(4*2)+(3*3)+(2*5)+(1*2)=137
137 % 10 = 7
So 87223-52-7 is a valid CAS Registry Number.

87223-52-7Downstream Products

87223-52-7Relevant articles and documents

Quinone Imine Route to Benzimidazol-2-ylcarbamates. Part 1. Synthesis of Open-chain and Cyclic 5-Acylamino Derivatives.

Rajappa, Srinivasachari,Sreenivasan, Ramaswami,Khalwadekar, Asha

, p. 1657 - 1675 (2007/10/02)

The synthesis of the N',N''-bismethoxycarbonyl-N-(4-acylaminophenyl)guanidines (4) and (7) is described.Oxidation of these with LTA has led to the benzimidazol-2-ylcarbamates. (8), (9) and (10) through a regiospecific cyclisation of quinone imine intermediates.If the acylamino group is part of a ring, the yield of benzimidazoles (15) increases with the size of the lactam ring.The direction of ring closure may be controlled by electronic and steric factors.

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