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191403-25-5

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191403-25-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191403-25-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,4,0 and 3 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 191403-25:
(8*1)+(7*9)+(6*1)+(5*4)+(4*0)+(3*3)+(2*2)+(1*5)=115
115 % 10 = 5
So 191403-25-5 is a valid CAS Registry Number.

191403-25-5Relevant articles and documents

Vanadium(V)-mediated rearrangement/halogenation cascade: Synthesis of α-haloenones from propargyl alcohols

Zhao, Meng,Mohr, Justin T.

, p. 4115 - 4124 (2017/06/29)

A method is described for the oxidative Meyer–Schuster-type rearrangement of propargylic alcohols to (Z)-α-chloro- and α-iodoenones using VOCl3 as a multifunctional reagent. The vanadium reagent is found to serve as rearrangement promoter as well as an active chlorenium ion donor. Yields are improved when VOCl3 is employed in conjunction with N-halosuccinimide reagents, giving some insights into the complex mechanism.

Synthesis of Vinyl-, Allyl-, and 2-Boryl Allylboronates via a Highly Selective Copper-Catalyzed Borylation of Propargylic Alcohols

Mao, Lujia,Bertermann, Rüdiger,Emmert, Katharina,Szabó, Kálmán J.,Marder, Todd B.

supporting information, p. 6586 - 6589 (2017/12/26)

An efficient methodology for the synthesis of vinyl-, allyl-, and (E)-2-boryl allylboronates from propargylic alcohols via Cu-catalyzed borylation under mild conditions is reported. In the presence of commercially available Cu(OAc)2 or Cu(acac)2 and Xantphos, the reaction affords the desired products in up to 92% yield with a broad substrate scope (43 examples). Isolation of an allenyl boronate as the reaction intermediate suggests that an insertion-elimination-type reaction, followed by borylcupration, is involved in the borylation of propargylic alcohols.

Dehydrogenative Meyer-Schuster-like rearrangement: A gold-catalyzed reaction generating an alkyne

Yu, Yang,Yang, Weibo,Pflaesterer, Daniel,Hashmi, A. Stephen K.

supporting information, p. 1144 - 1147 (2014/03/21)

Easily accessible propargylic esters are converted to the inverted alkynyl ketones in an oxidative gold-catalyzed reaction. Gagosz's catalyst in combination with PhI(OAc)2 is the best system for this conversion and 18 examples with yields up to 80 % are reported. The results indicate that the triple bond in the product is formed by elimination from a vinylgold intermediate. In a formal sense the new conversion overall is a dehydrogenative Meyer-Schuster rearrangement. It takes alkynes: Propargyl esters can be converted into alkynyl ketones by a new oxidative gold-catalyzed reaction. The best catalyst system is Ph3PAuCl/AgNTf2 in combination with the oxidant PhI(OAc)2. The yields are as high as 80 % and the reaction can be conducted in the presence of air. Copyright

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