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1256777-39-5

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1256777-39-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1256777-39-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,6,7,7 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1256777-39:
(9*1)+(8*2)+(7*5)+(6*6)+(5*7)+(4*7)+(3*7)+(2*3)+(1*9)=195
195 % 10 = 5
So 1256777-39-5 is a valid CAS Registry Number.

1256777-39-5Relevant articles and documents

A synthesis of dihydroimidazo[5,1-a]isoquinolines using a sequential Ugi-Bischler-Napieralski reaction sequence

Seganish, W. Michael,Bercovici, Ana,Ho, Ginny D.,Loozen, Hubert J.J.,Timmers, Cornelis M.,Tulshian, Deen

, p. 903 - 905 (2012/03/10)

A flexible route to analogues of dihydroimidazo[5,1-a]isoquinolines is described. The synthesis hinges on a sequential Ugi coupling, followed by a Bischler-Napieralski reaction to form the imidazole isoquinoline core. This route facilitates the introduction of a range of substitutions throughout the carbon framework.

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