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138478-21-4

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138478-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138478-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,7 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 138478-21:
(8*1)+(7*3)+(6*8)+(5*4)+(4*7)+(3*8)+(2*2)+(1*1)=154
154 % 10 = 4
So 138478-21-4 is a valid CAS Registry Number.

138478-21-4Downstream Products

138478-21-4Relevant articles and documents

The Regioselectivity of the Ring Opening of 1-Activated or Nonactivated 2-Alkoxycarbonyl or 2-Cyanoaziridines by Carbanions of the Dicarbonyl Compounds

Bouayad, Zoheir,Chanet-Ray, Josette,Ducher, S.,Vessiere, Roger

, p. 1757 - 1768 (2007/10/02)

Ring opening of title compounds with alkyl malonates, acetylacetone, methyl acetylacetate, and malononitrile was studied.The regioselectivity of the opening depends on several facts.A phenyl group on C-3 favours C-3-N bond cleavage, whereas C-2-N bond cleavage is predominant with C-3-substituted or C-2-H aziridines.Cyanoaziridines are predominantly cleaved at C-3-N.The aziridine configuration at C-2 and C-3 is maintained during the cyclisation in pyrrolidones.

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