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173912-91-9

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173912-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173912-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,9,1 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 173912-91:
(8*1)+(7*7)+(6*3)+(5*9)+(4*1)+(3*2)+(2*9)+(1*1)=149
149 % 10 = 9
So 173912-91-9 is a valid CAS Registry Number.

173912-91-9Downstream Products

173912-91-9Relevant articles and documents

An intramolecular cyclization of phenol derivatives bearing aminoquinones using a hypervalent iodine reagent

Kita, Yasuyuki,Takada, Takeshi,Ibaraki, Megumi,Gyoten, Michiyo,Mihara, Sachiko,Fujita, Shigekazu,Tohma, Hirofumi

, p. 223 - 227 (1996)

The hypervalent iodine oxidation of phenol derivatives bearing aminoquinones at the ortho (9) or meta positions (19) in 2,2,2-trifluoroethanol was investigated with the aim of preparing novel antitumor compounds. Azacarbocyclic spirodienone derivatives (13) or phenol derivatives containing the 2,3-dihydro-1H-azepine systems (17, 20) were selectively obtained by the reaction of these phenol derivatives and the hypervalent iodine reagent, phenyliodine(III) bis(trifluoroacetate). The application of this reaction to phenol derivatives bearing aminoquinones (10-12) is also described.

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