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1609003-83-9

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1609003-83-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1609003-83-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,9,0,0 and 3 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1609003-83:
(9*1)+(8*6)+(7*0)+(6*9)+(5*0)+(4*0)+(3*3)+(2*8)+(1*3)=139
139 % 10 = 9
So 1609003-83-9 is a valid CAS Registry Number.

1609003-83-9Relevant articles and documents

Highly site-selective direct C-H bond functionalization of phenols with α-aryl-α-diazoacetates and diazooxindoles via gold catalysis

Yu, Zhunzhun,Ma, Ben,Chen, Mingjin,Wu, Hai-Hong,Liu, Lu,Zhang, Junliang

supporting information, p. 6904 - 6907 (2014/06/09)

An unprecedented direct C-H bond functionalization of unprotected phenols with α-aryl α-diazoacetates and diazooxindoles was developed. A tris(2,4-di-tert-butylphenyl) phosphite derived gold complex promoted the highly chemoselective and site-selective C-H bond functionalization of phenols and N-acylanilines with gold-carbene generated from the decomposition of diazo compounds, furnishing the corresponding products in moderate to excellent yields at rt. The salient features of this reaction include readily available starting materials, unprecedented C-H functionalization rather than X-H insertion, good substrate scope, mild conditions, high efficiency, and ease in further transformation. To the best of our knowledge, this is the first example of C-H functionalization of unprotected phenols with diazo compounds.

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