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1188274-49-8

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1188274-49-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1188274-49-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,8,8,2,7 and 4 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1188274-49:
(9*1)+(8*1)+(7*8)+(6*8)+(5*2)+(4*7)+(3*4)+(2*4)+(1*9)=188
188 % 10 = 8
So 1188274-49-8 is a valid CAS Registry Number.

1188274-49-8Relevant articles and documents

Mild, efficient, and robust method for stereocomplementary iron-catalyzed cross-coupling using (E)- and (Z)-enol tosylates

Nishikado, Hiroshi,Nakatsuji, Hidefumi,Ueno, Kanako,Nagase, Ryohei,Tanabe, Yoo

experimental part, p. 2087 - 2092 (2010/10/03)

Iron-catalyzed cross-coupling of Grignard reagents (RMgX) with (E)- and (Z)-enol tosylates proceeded smoothly to give a variety of the corresponding (E)- and (Z)-trisubstituted ,-unsaturated methyl esters (total 30 examples; 55-98% yield). The simple, mild, stereoretentive method utilized iron(III) chloride (FeCl3), iron(III) acetylacetonate [Fe(acac)3], and iron(III) tris(dibenzylmethane) [Fe(dbm). The (E)- and (Z)-enol tosylates were readily prepared by the reported stereocomplementary tosylation method from methyl -keto esters or -formyl esters. Methyl -formyl esters were obtained via a practical and robust TiCl4-Et3N-mediated -formylation of methyl esters with methyl formate.

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