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172216-91-0

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172216-91-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172216-91-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,2,1 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 172216-91:
(8*1)+(7*7)+(6*2)+(5*2)+(4*1)+(3*6)+(2*9)+(1*1)=120
120 % 10 = 0
So 172216-91-0 is a valid CAS Registry Number.

172216-91-0Relevant articles and documents

Antiviral Compounds

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Page/Page column 14, (2012/09/25)

Novel compounds, methods, and compositions for treating various viral infections are described. In some embodiments the novel compounds of the invention are 3-oxo-phenothiazine derivatives; more specific embodiments include 3-oxo-phenothiazine derivatives having substituents at the 1-, 7-, and 9-positions of the phenothiazine parent ring. In other embodiments, the invention provides compositions and methods for treating viral infections, especially HIV.

Fischer indolization of ethyl pyruvate 2-[2- (trifluoromethyl)phenyl]phenylhydrazone and new insight into the mechanism of the Goldberg reaction. (Fischer indolization and its related compounds. XXVI)

Murakami,Watanabe,Hagiwara,Akiyama,Ishii

, p. 1281 - 1286 (2007/10/02)

The Fischer indolization of ethyl pyruvate 2-[2- (trifluoromethyl)phenyl]phenylhydrazone (5) gave two indolic products, ethyl 7-(trifluoromethyl)-1-phenylindole-2-carboxylate (12) as a minor product and ethyl 1-[2-(trifluoromethyl)phenyl]indole-2-carboxylate (13) as a major product. This result shows that the Fischer indolization occurred on the more electron-rich phenyl group. In the Goldberg reaction to prepare 13 from ethyl indole-2-carboxylate (15) and o- (21) or m-bromo-α,α,α-trifluorotoluene (23), it was found that Goldberg reaction proceeds via a benzyne mechanism, at least in part, in a sterically crowded situation.

Synthesis of coumarin derivatives as possible antifungal and antibacterial agents

Sengupta,Sen,Srivastava

, p. 710 - 716 (2007/10/02)

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