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170303-18-1

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170303-18-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 170303-18-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,0,3,0 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 170303-18:
(8*1)+(7*7)+(6*0)+(5*3)+(4*0)+(3*3)+(2*1)+(1*8)=91
91 % 10 = 1
So 170303-18-1 is a valid CAS Registry Number.

170303-18-1Downstream Products

170303-18-1Relevant articles and documents

Gold-catalyzed cycloisomerization of cyclopropyl alkynyl acetates: A versatile approach to 5-, 6-, and 7-membered carbocycles

Zou, Yue,Garayalde, David,Wang, Quanrui,Nevado, Cristina,Goeke, Andreas,Ito, Yoshihiko

supporting information; experimental part, p. 10110 - 10113 (2009/05/30)

Nonclassical chirality transfer? Depending on the substitution pattern of propargyl acetates, a gold-catalyzed homologous Rautenstrauch reaction generates either 5- or 6-membered ring systems (see scheme). The stabilization of cationic intermediates is crucial for this reaction to succeed. The underlying principle for the good chirality transfer observed could be gold-stabilized nonclassical carbocations having configurational stability.

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