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873381-94-3

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873381-94-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 873381-94-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,3,3,8 and 1 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 873381-94:
(8*8)+(7*7)+(6*3)+(5*3)+(4*8)+(3*1)+(2*9)+(1*4)=203
203 % 10 = 3
So 873381-94-3 is a valid CAS Registry Number.

873381-94-3Relevant articles and documents

Benzofuran synthesis via copper-mediated oxidative annulation of phenols and unactivated internal alkynes

Zhu, Ruyi,Wei, Jiangbo,Shi, Zhangjie

, p. 3706 - 3711 (2013/11/19)

The first example of copper-mediated oxidative annulation of phenols and unactivated internal alkynes to afford benzofuran derivatives was reported. Various phenols and unactivated internal alkynes were successfully employed. Mechanistic studies disclosed a new strategy on annulations of alkynes with phenols through reversible electrophilic carbocupration of phenol followed by alkyne insertion and cyclization.

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