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1021934-20-2

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1021934-20-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1021934-20-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,1,9,3 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1021934-20:
(9*1)+(8*0)+(7*2)+(6*1)+(5*9)+(4*3)+(3*4)+(2*2)+(1*0)=102
102 % 10 = 2
So 1021934-20-2 is a valid CAS Registry Number.

1021934-20-2Upstream product

1021934-20-2Relevant articles and documents

Et2Zn-mediated rearrangement of bromohydrins

Li, Lezhen,Cai, Peijie,Guo, Qingxiang,Xue, Song

, p. 3516 - 3522 (2008/09/20)

(Chemical Equation Presented) A simple and highly efficient method for the rearrangement of bromohydrins mediated by Et2Zn to synthesize carbonyl compounds was described. Various β-bromo alcohols were treated with 0.6 equiv of Et2Zn to form a zinc complex in CH 2Cl2 at room temperature for 2 h, followed by 1,2-migration to give the corresponding carbonyl compounds. This remarkable and clean rearrangement is general for acyclic and cyclic bromohydrins, and a variety of ring-expansive and -contractive carbonyl compounds were obtained in good to excellent yields according to the feature of the starting bromohydrins. The functional group tolerance of organozinc reagents in this reaction will be useful in organic synthesis. The scope and limitations of this rearrangement process were also investigated.

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