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303158-02-3

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303158-02-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 303158-02-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,3,1,5 and 8 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 303158-02:
(8*3)+(7*0)+(6*3)+(5*1)+(4*5)+(3*8)+(2*0)+(1*2)=93
93 % 10 = 3
So 303158-02-3 is a valid CAS Registry Number.

303158-02-3Relevant articles and documents

Synthesis of alkyl N-(C-nitrosoaryl)carbamates and some reactions thereof

Velikorodov

, p. 233 - 239 (2007/10/03)

Reactions of alkyl N-phenylcarbamates, m-di(methoxycarboxyamido)benzene, and methyl N-(o-tolyl)carbamate with nitrosylsulfuric acid in glacial acetic acid afford N-(C-nitrosoaryl)carbamates; under these conditions tert-bulyl N-phenylcarbamate suffers decarboxylation, methyl N-(p-tolyl)-, methyl N-(p-methoxyphenyl)carbamates, o-and p-di(methoxycarboxyamido)benzenes are nitrated, and isomeric methyl N-nitrophenylcarbamates and methyl N-(p-bromophenyl)carbamate do not react. The reduction of N-(C-nitrosoaryl)carbamates with dithionite afforded the corresponding aminocarbamates; the oxidation with nitric acid yielded carbamate nitro derivatives; the condensation with aniline and benzylpyridinium chloride resulted in carbamate derivatives of azobenzene and phenylnitron.

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