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1573176-40-5

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1573176-40-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1573176-40-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,7,3,1,7 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1573176-40:
(9*1)+(8*5)+(7*7)+(6*3)+(5*1)+(4*7)+(3*6)+(2*4)+(1*0)=175
175 % 10 = 5
So 1573176-40-5 is a valid CAS Registry Number.

1573176-40-5Relevant articles and documents

Silylethynyl substituents as porphyrin protecting groups for solubilization and selectivity control

Oda, Kazuma,Akita, Masanari,Hiroto, Satoru,Shinokubo, Hiroshi

, p. 1818 - 1821 (2014/04/17)

Silylethynyl substituents are proposed as protecting groups for porphyrin derivatives to enhance their solubility and enable regioselective functionalization. After usage as protecting groups, silylethynyl groups at the meso-positions can be efficiently removed upon heating with aqueous H 2SO4 in the presence of a surfactant. This approach was applied to the preparation of unsymmetrically β-substituted porphyrins and porphin-porphyrin oligomers, which were inaccessible by conventional methods.

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