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128894-19-9

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128894-19-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128894-19-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,9 and 4 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 128894-19:
(8*1)+(7*2)+(6*8)+(5*8)+(4*9)+(3*4)+(2*1)+(1*9)=169
169 % 10 = 9
So 128894-19-9 is a valid CAS Registry Number.

128894-19-9Relevant articles and documents

Formation of P-Ylide under Neutral and Metal-Free Conditions: Transformation of Aziridines and Epoxides to Conjugated Dienes in the Presence of Phosphine

Fan, Ren-Hua,Hou, Xue-Long,Dai, Li-Xin

, p. 689 - 694 (2004)

A general approach to formation of the P-ylide from the reaction of aziridines or epoxides with organophosphine under neutral and metal-free conditions is realized. Conjugated diene derivatives based on this kind of P-ylide were prepared in a facile and c

Rearrangement of allylic and propargylic alcohols catalyzed by the combined use of tetrabutylammonium perrhenate(VII) and p-toluenesulfonic acid

Narasaka,Kusama,Hayashi

, p. 2059 - 2068 (2007/10/02)

Allylic rearrangement and/or dehydration reaction of allylic alcohols proceeds smoothly by the use of catalytic amounts of tetrabutylammonium perrhenate and p-toluenesulfonic acid hydrate. Treatment of propargylic alcohols with the catalysts at room temperature affords the rearranged products, α,β-unsaturated carbonyl compounds, while β,γ-unsaturated ketones are obtained as main products by the reaction in refluxing 1,2-dichloroethane. The application of this catalytic system is also described for the preparation of some synthetic intermediates.

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