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1257231-44-9

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1257231-44-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257231-44-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,2,3 and 1 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1257231-44:
(9*1)+(8*2)+(7*5)+(6*7)+(5*2)+(4*3)+(3*1)+(2*4)+(1*4)=139
139 % 10 = 9
So 1257231-44-9 is a valid CAS Registry Number.

1257231-44-9Downstream Products

1257231-44-9Relevant articles and documents

Intramolecular Nicholas reactions in the synthesis of dibenzocycloheptanes. Synthesis of allocolchicine NSC 51046 and analogues and the formal synthesis of (-)-allocolchicine

Djurdjevic, Sinisa,Yang, Fei,Green, James R.

, p. 8241 - 8251 (2011/03/18)

The preparation of dibenzocycloheptyne-Co2(CO)6 complexes by intramolecular Nicholas reactions of biaryl-2-propargyl alcohol-Co2(CO)6 derivatives is described. Reductive decomplexation of the dibenzocycloheptyne

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