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89563-71-3

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89563-71-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89563-71-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,5,6 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 89563-71:
(7*8)+(6*9)+(5*5)+(4*6)+(3*3)+(2*7)+(1*1)=183
183 % 10 = 3
So 89563-71-3 is a valid CAS Registry Number.

89563-71-3Downstream Products

89563-71-3Relevant articles and documents

2-(N,N-Disubstituted Amino)thiazoles with Electron-withdrawing Groups at Position 5: Prepaeation and Investigation on Structural Features

Birkinshaw, Timothy N.,Gillon, David W.,Harkin, Shaun A.,Meakins, G. Denis,Tirel, Malkom D.

, p. 147 - 153 (2007/10/02)

A convenient procedure for preparing N-mono- and NN-di-substituted cyanamides from cyanogen bromide has been developed.N,N-Disubstituted thioureas, obtained from the cyanamides, were condensed with α-bromo-α-cyanoketones to give 5-cyano-2-(N,N-disubstituted amino)thiazoles and with α-bromo-ketones to give 2-(N,N-disubstituted amino)thiazoles.Substitution in the latter products afforded 5-trifluoroacetyl- and 5-nitro-2-(N,N-disubstituted amino)thiazoles; nitration is greatly facilitated by the presence of a 4-aryl group.The average values of the barriers of rotation of the barriers to rotation of the 2-NR2 groups (ΔG298) in the 5-substituted thiazoles were established by variable temperature 1H n.m.r. spectrometry to be 57.4 kJ mol -1 (5-NO2), 56.2 (5-COCF3), and 51.5 (5-CN).I.r. examination showed that the 5-trifluoroacetyl compounds adopt one rotational form preferentially; this is probably the carbonyl O,S-syn-conformation.

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