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53821-00-4

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53821-00-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53821-00-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,8,2 and 1 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 53821-00:
(7*5)+(6*3)+(5*8)+(4*2)+(3*1)+(2*0)+(1*0)=104
104 % 10 = 4
So 53821-00-4 is a valid CAS Registry Number.

53821-00-4Relevant articles and documents

Metal-free late-stage C(sp2)-H functionalization of: N -aryl amines with various sodium salts

Mudithanapelli, Chandrashekar,Kim, Mi-Hyun

, p. 450 - 464 (2020/02/03)

Metal-free consecutive C(sp2)-X (X = Cl, Br, S, N) bond formations of N-aryl amines (cyclic, fused, carbamate, and aminium radicals) were achieved under mild conditions using [bis(trifluoroacetoxy)iodo]benzene (PIFA) and simple nonharmful sodium salts. This direct and selective C(sp2)-H functionalization showed excellent functional group compatibility, cost effectiveness, and late-stage applicability for the synthesis of biologically active natural products. Two mechanisms were proposed to explain the ortho- or para-preference, as well as the accelerating effect of CH3NO2

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