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188923-19-5

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188923-19-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 188923-19-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,9,2 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 188923-19:
(8*1)+(7*8)+(6*8)+(5*9)+(4*2)+(3*3)+(2*1)+(1*9)=185
185 % 10 = 5
So 188923-19-5 is a valid CAS Registry Number.

188923-19-5Relevant articles and documents

Process for producing amide derivatives and intermediates therefor

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, (2008/06/13)

PCT No. PCT/JP96/02756 Sec. 371 Date Apr. 14, 1998 Sec. 102(e) Date Apr. 14, 1998 PCT Filed Sep. 24, 1996 PCT Pub. No. WO97/11937 PCT Pub. Date Apr. 3, 1997A method for producing an amide derivative of the formula [XV] wherein each symbol is as defined in the specification, and an enantiomer thereof, a novel intermediate useful for producing said compound and a production method thereof. The production method of the present invention is extremely easy and simple as compared to the conventional methods, and enables effective production of compound [XV] at high yields, which includes compound [XVI] having an HIV protease inhibitory action. In addition, the novel intermediates of the present invention are extremely useful as intermediates for producing not only the aforementioned compound [XVI] but also compounds useful as X-ray contrast media.

A Practical Synthesis of Nelfinavir, an HIV-Protease Inhibitor, Using a Novel Chiral C4 Building Block: (5R,6S)-2,2-Dimethyl-5-hydroxy-l,3-dioxepan-6-ylammonium Acetate

Inaba, Takashi,Birchler, Angela G.,Yamada, Yasuki,Sagawa, Shoichi,Yokota, Katsuyuki,Ando, Koji,Uchida, Itsuo

, p. 7582 - 7583 (2007/10/03)

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