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58155-85-4

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58155-85-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 58155-85-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,8,1,5 and 5 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 58155-85:
(7*5)+(6*8)+(5*1)+(4*5)+(3*5)+(2*8)+(1*5)=144
144 % 10 = 4
So 58155-85-4 is a valid CAS Registry Number.

58155-85-4Relevant articles and documents

Reaction of 6,8-Dibromo-2-methyl-3,1-benzoxazin-4(H)-one with Some Nucleophilic Reagents : Synthesis of Quinazoline, Tetrazole and Benzimidazole Derivatives

Ismail, M. F.,Shams, N. A.,Naguib, M. I.

, p. 394 - 397 (2007/10/02)

6,8-Dibromo-2-methyl-3,1-benzoxazin-4(H)-one (1) reacts with primary amines, hydrazines, hydroxylamine and semicarbazide to give the ring opening products (2), (4), (9) and (12), respectively.Compounds (2) undergo cyclisation to 3-substituted 6,8-dibromo-2-methyl-4-quinazolones (3) when heated above their melting points.Action of selenium dioxide and N-bromosuccinimide on 3 has also been investigated.Compound (1) undergoes condensation with benzaldehyde to give (8) which reacts with benzylamine and hydrazine hydrate to give 9a and 9b, respectively.Compound (8) also reacts with hydrazoic acid to give a mixture of tetrazole (11) and benzimidazolone (12).

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