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42188-33-0

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42188-33-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42188-33-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,1,8 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 42188-33:
(7*4)+(6*2)+(5*1)+(4*8)+(3*8)+(2*3)+(1*3)=110
110 % 10 = 0
So 42188-33-0 is a valid CAS Registry Number.

42188-33-0Downstream Products

42188-33-0Relevant articles and documents

Nucleoside Syntheses, XXII. Nucleoside Synthesis with Trimethylsilyl Triflate and Perchlorate as Catalysts

Vorbrueggen, Helmut,Krolikiewicz, Konrad,Bennua, Baerbel

, p. 1234 - 1255 (2007/10/02)

The novel Lewis acids (CH3)3SiOSO2CF3 (5), (CH3)3SiOSO2C4F9 (6), and (CH3)3SiClO4 (4) are highly selective and efficient Friedel-Crafts catalysts for nucleoside formation from silylated heterocycles and peracylated sugars as well as for rearrangements of persilylated protected nucleosides.With basic silylated heterocycles these new catalysts give much higher yields of the natural N-1-nucleosides than with SnCl4.

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