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221353-98-6

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221353-98-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221353-98-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,5 and 3 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 221353-98:
(8*2)+(7*2)+(6*1)+(5*3)+(4*5)+(3*3)+(2*9)+(1*8)=106
106 % 10 = 6
So 221353-98-6 is a valid CAS Registry Number.

221353-98-6Relevant articles and documents

Facile double-lithiation of a transient urea: Vicarious ortho -metalation of aniline derivatives

Houlden, Chris E.,Lloyd-Jones, Guy C.,Booker-Milburn, Kevin I.

supporting information; experimental part, p. 3090 - 3092 (2010/09/05)

A convenient one-pot method for the conversion of phenylisocyanate into ortho-functionalized aniline derivatives has been developed. The reaction proceeds via the selective ortho-metalation of a transient labile urea, which can be considered as a synthetic equivalent of 2-lithio-phenylisocyanate, a highly improbable intermediate.

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