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25643-78-1

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25643-78-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25643-78-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,4 and 3 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 25643-78:
(7*2)+(6*5)+(5*6)+(4*4)+(3*3)+(2*7)+(1*8)=121
121 % 10 = 1
So 25643-78-1 is a valid CAS Registry Number.

25643-78-1Relevant articles and documents

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Lavayssiere et al.

, p. C59 (1978)

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Guanidines as a nitrogen source for direct conversion of epoxides to aziridines

Tsuchiya, Yukiko,Kumamoto, Takuya,Ishikawa, Tsutomu

, p. 8504 - 8505 (2007/10/03)

Direct conversion of epoxides to aziridines was achieved with guanidines as a nitrogen source. Stereochemical inversion at the chiral centers of epoxides was observed without loss of optical purity.

Aminosilylation of heterocumulenes and the intramolecular decomposition of their silyl-functionalized adducts

Corriu, R. J. P.,Lanneau, Gerard F.,Mehta, V. D.

, p. 9 - 26 (2007/10/02)

Heteroorganic amidosilanes are readily obtained by interaction of CO2, CS2 and other heterocumulenes with pentacoordinated diaminosilanes.A comparison is made with the corresponding reactions of tetracoordinated species.Decompositon of these bifunctional organosilanes gives 2-substituted ureido derivatives and base-stabilized low coordinated silicon species, seemingly by a unimolecular thermal β-elimination.

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