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189955-79-1

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189955-79-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189955-79-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,9,5 and 5 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 189955-79:
(8*1)+(7*8)+(6*9)+(5*9)+(4*5)+(3*5)+(2*7)+(1*9)=221
221 % 10 = 1
So 189955-79-1 is a valid CAS Registry Number.

189955-79-1Relevant articles and documents

Synthetic method for firocoxib important intermediate

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Paragraph 0044; 0045; 0046; 0047; 0048; 0049-0064, (2019/01/14)

The invention relates to a synthetic method for a firocoxib important intermediate. P-methyl-iso-butyryl benzene is taken as an initial raw material and a one-pot method is adopted for firstly generating a bromide intermediate in a NBS (N-bromosuccinimide

Firocoxib preparation method

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Paragraph 0014; 0015, (2017/03/14)

The invention discloses a firocoxib preparation method and relates to the technical field of chemical synthesis, in particular to a novel method for synthesizing firocoxib. The novel method for synthesizing the firocoxib includes subjecting thioanisole serving as a raw material to acylation reaction, bromination reaction, oxidizing reaction, esterification reaction and cyclization reaction sequentially so as to obtain the firocoxib. Compared with a traditional technology, the novel method for synthesizing the firocoxib has the advantages that an aftertreatment process is simple without column chromatography separation, and the method is high in yield, low in cost and suitable for industrial production.

(Methylsulfonyl)phenyl-2-(5H)-furanones as COX-2 inhibitors

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, (2008/06/13)

The invention encompasses the novel compound of Formula I useful in the treatment of cyclooxygenase-2 mediated diseases. STR1 The invention also encompasses certain pharmaceutical compositions for treatment of cyclooxygenase-2 mediated diseases comprising compounds of Formula I.

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