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113202-20-3

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113202-20-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113202-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,2,0 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 113202-20:
(8*1)+(7*1)+(6*3)+(5*2)+(4*0)+(3*2)+(2*2)+(1*0)=53
53 % 10 = 3
So 113202-20-3 is a valid CAS Registry Number.

113202-20-3Downstream Products

113202-20-3Relevant articles and documents

Regiospecific Lithiation of Phenoxazine Ortho to the Oxygen Atom. Synthesis of 4-Mono- and 4,6-Disubstituted Phenoxazine Derivatives

Antonio, Yulia,Barrera, Patricia,Contreras, Olga,Franco, Fidencio,Galeazzi, Edvige,et al.

, p. 2159 - 2165 (2007/10/02)

Under appropriate conditions, phenoxazine bearing a sterically demanding, bulky N-substituent (e.g., α-methylbenzyl or tert-butyldimethylsilyl) undergoes lithiation at C-4 or at C-4 and C-6 with n-butyllithium in THF solution.The lithiated species react with a variety of electrophilic reagents and upon subsequent N-deprotection provide access to 4-mono- or 4,6-disubstituted phenoxazines.This process is of particular synthetic utility (36-54percent yields) when the N-substituent is tert-butyldimethylsilyl.

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