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40939-26-2

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40939-26-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40939-26-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,9,3 and 9 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 40939-26:
(7*4)+(6*0)+(5*9)+(4*3)+(3*9)+(2*2)+(1*6)=122
122 % 10 = 2
So 40939-26-2 is a valid CAS Registry Number.

40939-26-2Relevant articles and documents

Palladium-mediated C-N, C-C, and C-O functionalization of azolopyrimidines: a new total synthesis of variolin B

Baeza, Alejandro,Mendiola, Javier,Burgos, Carolina,Alvarez-Builla, Julio,Vaquero, Juan J.

, p. 4073 - 4077 (2008)

A new total synthesis of the alkaloid variolin B is achieved by a selective and sequential palladium-mediated functionalization of a trihalo-substituted pyrido[3′,2′:4,5]pyrrolo[1,2-c]pyrimidine. This intermediate is obtained by a new heterocyclization reaction between an appropriate bromomethyl azaindole and N-tosylmethyl dichloroformimide. The methodology may be effective for the synthesis of some analogs by substitution on the relatively unexplored C4 and C9 positions of the alkaloid.

A simple, general synthesis of carbonimidic dichlorides

Gober, Claire M.,Le, Hoang V.,Ganem, Bruce

experimental part, p. 4536 - 4537 (2012/09/25)

The reaction of aliphatic and aromatic isonitriles with sulfuryl chloride provides an efficient, general route to the corresponding dichlorides without byproducts of free-radical substitution.

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