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169140-90-3

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169140-90-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169140-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,1,4 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 169140-90:
(8*1)+(7*6)+(6*9)+(5*1)+(4*4)+(3*0)+(2*9)+(1*0)=143
143 % 10 = 3
So 169140-90-3 is a valid CAS Registry Number.

169140-90-3Downstream Products

169140-90-3Relevant articles and documents

4-Isocyanopermethylbutane-1,1,3-triol (IPB): A convertible isonitrile for multicomponent reactions

Neves Filho, Ricardo A.W.,Stark, Sebastian,Morejon, Micjel C.,Westermann, Bernhard,Wessjohann, Ludger A.

supporting information, p. 5360 - 5363 (2012/10/30)

The synthesis and applications of 4-isocyanopermethylbutane-1,1,3-triol (IPB) as a new convertible isonitrile (isocyanide) for isocyanide-based multicomponent reactions (IMCRs) like Ugi, Ugi-Smiles, and Passerini reactions are described. The primary products obtained from these IMCRs can be converted into highly activated N-acylpyrroles, which upon treatment with nucleophiles can be transformed into carboxylic acids, esters, amides, alcohols, and olefins. In this sense the reagent can be seen as a neutral carbanion equivalent to formate (HO2C-), and carboxylates or carboxamides etc. (RNu-CO-).

An efficient catalytic stereoselective route to a key intermediate for the synthesis of the long-lived PGI2 analog ZK 96480 (Cicaprost(TM))

Corey,Helal, Christopher J.

, p. 7511 - 7514 (2007/10/03)

An expeditious and stereoselective synthesis of a key chiral intermediate (2) for the synthesis of the therapeutically useful PGI2 analog Cicaprost(TM) is described.

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