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40523-47-5

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40523-47-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40523-47-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,5,2 and 3 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 40523-47:
(7*4)+(6*0)+(5*5)+(4*2)+(3*3)+(2*4)+(1*7)=85
85 % 10 = 5
So 40523-47-5 is a valid CAS Registry Number.

40523-47-5Relevant articles and documents

Iron-catalyzed stereoselective haloamidation of amide-tethered alkynes

Liu, Jin-Biao,Ren, Miaofeng,Lai, Xiaojing,Qiu, Guanyinsheng

supporting information, p. 4259 - 4262 (2021/05/05)

In this work, by usingN-methoxybenzamides as efficient acyl nitrene precursors, an iron-catalyzed formalcis-haloamidation of alkyne is reported. Without assistance of additives, the reaction worked well in the presence of 50 mol% FeCl3or FeBr3, leading to a series of chloro/bromo-containing isoindolin-5-ones with high efficiency and wide reaction scope. In the reaction, the iron-facilitated haloamidation proceeds through a halo anion-participating concerted [3+2] cyclization to release the final products. The key intermediate ferric acyl nitreneAis generatedin situfrom a formal removal of MeOH.

Ir(III)-Catalyzed Stereoselective Haloamidation of Alkynes Enabled by Ligand Participation

Hong, Seung Youn,Son, Junsoo,Kim, Dongwook,Chang, Sukbok

supporting information, p. 12359 - 12363 (2018/10/02)

Described herein is the application of a strategy of ligand participation for the Ir-catalyzed imido transfer into alkynes. On the basis of a stoichiometric [3 + 2] cycloaddition of Cp?Ir(III)(κ2-N,O-chelate) with alkynyl dioxazolone, a catalyt

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