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1033548-25-2

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1033548-25-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1033548-25-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,3,3,5,4 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1033548-25:
(9*1)+(8*0)+(7*3)+(6*3)+(5*5)+(4*4)+(3*8)+(2*2)+(1*5)=122
122 % 10 = 2
So 1033548-25-2 is a valid CAS Registry Number.

1033548-25-2Relevant articles and documents

Synthesis of diazaheterocyclic ring-fused 1,2,4-benzothiadiazine 1,1-dioxides by a sequential aza-Wittig/NH-addition cyclization/nucleophilic ring-closure methodology with N-alkenyl-2-carbodiimidobenzenesulfonamides as key intermediates

Hirota, Shinsuke,Kato, Ryo,Suzuki, Madoka,Soneta, Yuji,Otani, Takashi,Saito, Takao

scheme or table, p. 2075 - 2083 (2009/04/04)

Treatment of N-alkenyl-2-azidobenzenesulfonamides with triphenylphosphane and subsequent subjection of the resulting iminophosphoranes to aza-Wittig reactions with isocyanates generated functionalized carbodiimides, which spontaneously underwent cyclization to form 2-alkenyl-3-(R2- substituted amino)-2H-1,2,4-benzothiadiazine 1,1-dioxides by internal nucleophilic addition. Subsequent (tandem) cyclizations through iodoamination or hydroamination with HgII/NaBH4 produced a variety of diazaheterocyclic ring-fused benzothiadiazine dioxides. In one case a methanobridged benzothiatriazabicyclotridecanone was obtained. The scope and limitations of these cyclizations are reported. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

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