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1638253-88-9

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1638253-88-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1638253-88-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,2,5 and 3 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1638253-88:
(9*1)+(8*6)+(7*3)+(6*8)+(5*2)+(4*5)+(3*3)+(2*8)+(1*8)=189
189 % 10 = 9
So 1638253-88-9 is a valid CAS Registry Number.

1638253-88-9Downstream Products

1638253-88-9Relevant articles and documents

Peculiarities of the cascade cleavage of the polarized C - C-fragment in α-ketoacetylenes on reaction with ethylene diamine

Vasilevsky, Sergei F.,Davydova, Maria P.,Tomilin, Denis N.,Sobenina, Lyubov N.,Mamatuyk, Victor I.,Pleshkova, Nadezhda V.

, p. 132 - 144 (2014/08/18)

The reaction of diarylketoacetylenes with ethylenediamine (EDA) leads to arylmethylketones and 2-substituted imidazoline derivatives. This transformation involves complete cleavage of the triple bond via initial intermolecular Michael-addition with subsequent intramolecular Michaeladdition. Final fragmentation can be presented as a retro-Mannich reaction, accompanied by three formal reductive stages (formation of three C-H bonds), while the other carbon undergoes a formal oxidation, in which three C-N bonds (C-N and C=N) are formed. ARKAT-USA, Inc.

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