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171617-77-9

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171617-77-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 171617-77-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,6,1 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 171617-77:
(8*1)+(7*7)+(6*1)+(5*6)+(4*1)+(3*7)+(2*7)+(1*7)=139
139 % 10 = 9
So 171617-77-9 is a valid CAS Registry Number.

171617-77-9Relevant articles and documents

Synthesis of C3-substituted enantiopure 2-(p-tolylsulfinyl)-furans: The sulfoxide group as a chiral inductor for furan dienes as precursors of a wide variety of chiral intermediates

Montana, Angel M.,Grima, Pedro M.,Batalla, Consuelo,Kociok-Koehn, Gabriele

, p. 677 - 689 (2014/05/20)

(-)-(1R,2S,5R)-Menthyl (SS)-p-toluenesulfinate and its enantiomer are a common source for a chiral sulfoxide group in organic synthesis, by means of nucleophilic substitution. The replacement of the menthyloxy group, with complete inversion of configuration at the sulfur center of the chiral sulfoxide, allows the inclusion of this organic function into numerous substrates, with defined stereochemistry and high enantiomeric purity. Nine C3-substituted, enantiomerically pure, 2-sulfinylfurans were prepared by this synthetic methodology with moderate to high yields. These enantiopure C3-substituted 2-sulfinylfurans can be used as chiral dienes for [4+3] cycloaddition reactions and in other chemical transformations, in which π-facial selectivity should be induced in order to obtain enantioselective reactions.

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