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87743-55-3

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87743-55-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87743-55-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,7,4 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 87743-55:
(7*8)+(6*7)+(5*7)+(4*4)+(3*3)+(2*5)+(1*5)=173
173 % 10 = 3
So 87743-55-3 is a valid CAS Registry Number.

87743-55-3Relevant articles and documents

An Exceptionally Mild, Catalytic Homogeneous Method for the Conversion of Amines into Carbamate Esters

Alper, Howard,Hartstock, Frederick W.

, p. 1141 - 1142 (1985)

Aromatic amines react at room temperature and atmospheric pressure with carbon monoxide, oxygen, alcohols, and hydrochloric acid, with palladium chloride as the catalyst and copper(II) chloride as re-oxidant to give carbamate esters in fair to quantitative yields.

Synthesis and in vitro antimycobacterial activity of novel n-arylpiperazines containing an ethane-1,2-diyl connecting chain

Gonec, Tomás,Malík, Ivan,Cs?llei, Jozef,Jampílek, Josef,Stolaríková, Jirina,Solovic, Ivan,Miku, Peter,Keltoová, Stanislava,Kollár, Peter,O'Mahony, Jim,Coffey, Aidan

, (2018/01/17)

Novel 1-(2-{3-/4-[(alkoxycarbonyl)amino]phenyl}-2-hydroxyethyl)-4-(2-fluorophenyl)-piperazin-1-ium chlorides (alkoxy = methoxy to butoxy; 8a-h) have been designed and synthesized through multistep reactions as a part of on-going research programme focused

Kinetic study of the reactions of methyl 2,4,6-trinitrophenyl carbonate with anilines

Castro, Enrique A.,Aliaga, Margarita E.,Santos, Jose G.

experimental part, p. 23 - 30 (2011/05/15)

The title reactions in water are subjected to a kinetic investigation. Under excess amine, pseudo-first-order rate coefficients (kobsd) are obtained. Plots of kobsd against aniline concentration are linear, with kN as the slope. The Bronsted-type plot (log kN vs anilinium pK a) is linear with slope 0.7, consistent with a concerted mechanism. By comparison of these reactions with others, it is concluded that anilines destabilize the tetrahedral intermediate relative to isobasic pyridines. The change of 2,4-dinitrophenoxide by 2,4,6-trinitrophenoxide as the leaving group of the carbonate destabilizes the tetrahedral intermediate and makes possible a change in mechanism. ARKAT-USA, Inc.

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