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173322-57-1

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173322-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173322-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,3,2 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 173322-57:
(8*1)+(7*7)+(6*3)+(5*3)+(4*2)+(3*2)+(2*5)+(1*7)=121
121 % 10 = 1
So 173322-57-1 is a valid CAS Registry Number.

173322-57-1Relevant articles and documents

Synthesis of meso-tetraphenylthiaporphyrins bearing one inverted pyrrole

Lee, Chang-Hee,Kim, Han-Je

, p. 3935 - 3938 (1997)

2-Aza-21-thia-23-carba-5,10,15,20-tetraphenylporphyrin and its N-methylated analogue were synthesized and characterized. The synthesis utilizers [3+1] condensation of thiatripyrrin with 2,4-bis(α-hydroxy-α-phenylmethyl)pyrrole or 2,4-bis(α-hydroxy-α-pheny

Water soluble, core-modified porphyrins. 3. Synthesis, photophysical properties, and in vitro studies of photosensitization, uptake, and localization with carboxylic acid-substituted derivatives

You, Youngjae,Gibson, Scott L.,Hilf, Russell,Davies, Sherry R.,Oseroff, Allan R.,Roy, Indrajit,Ohulchanskyy, Tymish Y.,Bergey, Earl J.,Detty, Michael R.

, p. 3734 - 3747 (2007/10/03)

Water soluble, core-modified porphyrins 1-5 bearing 1-4 carboxylic acid groups were prepared and evaluated in vitro as photosensitizers for photodynamic therapy. The 21,23-core-modified porphyrins 1-5 gave band I absorption maxima with λmax of

Synthesis of pseudoaromatic expanded porphyrin analogues

Lee,Oh

, p. 1921 - 1924 (2007/10/03)

Optically active expanded porphyrins bearing thiophene were synthesized by Schiff base forming reaction. The condensation of thiophene containing 1,14-bisformyl tripyrrane with aromatic diamines failed to give desired macrocycles but condensation with aliphatic 1,2-diamines gave the desired products. The macrocycles synthesized tend to maintain 18π system and the ethylene bridge shows somewhat resistance toward oxidation.

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