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106031-63-4

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106031-63-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 106031-63-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,6,0,3 and 1 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 106031-63:
(8*1)+(7*0)+(6*6)+(5*0)+(4*3)+(3*1)+(2*6)+(1*3)=74
74 % 10 = 4
So 106031-63-4 is a valid CAS Registry Number.

106031-63-4Relevant articles and documents

An Efficient Synthesis of Benzofluorenes Via α-Alkoxycarbonyldiarylmethyl Cations

Hopkinson, A. C.,Lee-Ruff, E.,Maleki, M.

, p. 366 - 371 (2007/10/02)

Rearrangement of α-alkoxycarbonyldiarylmethyl cations lead to 9-fluorenecarboxylic esters.Decarboxylation of these esters generates the fluorene derivatives 9a-f.The precursors to the cations are the α-hydroxyesters 6a-g.This conversion constitutes a facile synthesis of benzofluorenes.

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