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1313728-42-5

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1313728-42-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1313728-42-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,1,3,7,2 and 8 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1313728-42:
(9*1)+(8*3)+(7*1)+(6*3)+(5*7)+(4*2)+(3*8)+(2*4)+(1*2)=135
135 % 10 = 5
So 1313728-42-5 is a valid CAS Registry Number.

1313728-42-5Relevant articles and documents

The heck reaction of protected hydroxychromones: On route to natural products

Vasas, Attila,Patonay, Tamas,Konya, Krisztina,Silva, Artur M. S.,Cavaleiro, Jose A. S.

, p. 647 - 657 (2011/12/16)

The Heck reaction has been successfully extended to the bromochromones with an adjacent protected phenolic hydroxy group which offers a new methodology to various naturally occurring derivatives including tricyclic O-heterocycles. Phosphine-free coupling conditions are found to be effective. Surprisingly, the methoxymethyl protecting group is unstable in several cases but benzyl proved to be an ideal protecting group which could be selectively cleaved by boron trihalides in good yields. CSIRO 2011.

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