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20259-38-5

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20259-38-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20259-38-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,5 and 9 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20259-38:
(7*2)+(6*0)+(5*2)+(4*5)+(3*9)+(2*3)+(1*8)=85
85 % 10 = 5
So 20259-38-5 is a valid CAS Registry Number.

20259-38-5Relevant articles and documents

Cu-Catalyzed electrophilic amination of internal alkynes via hydroalumination

Yoon, Hongju,Kim, Yuna,Lee, Yunmi

supporting information, p. 790 - 795 (2017/02/05)

A straightforward and efficient method for the synthesis of 1,2-diaryl-substituted enamines through the Cu-catalyzed electrophilic amination reaction of O-benzoyl hydroxylamines with vinylaluminum reagents generated in situ from the Ni-catalyzed hydroalumination of readily accessible internal aryl acetylenes is described. The amination is catalyzed by 1 mol% CuCl without any additive at ambient temperature to afford new versatile enamines in good yield (61-91%) with high selectivity (>98% E-enamine).

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