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1394172-80-5

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1394172-80-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1394172-80-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,9,4,1,7 and 2 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1394172-80:
(9*1)+(8*3)+(7*9)+(6*4)+(5*1)+(4*7)+(3*2)+(2*8)+(1*0)=175
175 % 10 = 5
So 1394172-80-5 is a valid CAS Registry Number.

1394172-80-5Relevant articles and documents

Catalytic intermolecular C-alkylation of 1,2-diketones with simple olefins: A recyclable directing group strategy

Wang, Zhiqian,Reinus, Brandon J.,Dong, Guangbin

supporting information, p. 13954 - 13957 (2012/10/29)

We describe the first example of Rh-catalyzed intermolecular C-alkylation of cyclic 1,2-diketones using simple terminal olefins as alkylating agents. Aminopyridine is employed as a recyclable directing group. First, it reacts with ketones to give enamines and delivers Rh to activate the vinyl C-H bonds in the same pot; second, it can be cleaved off and recovered via hydrolysis. A broad range of olefins can be utilized as substrates, including aliphatic, aromatic olefins and vinyl esters. The efficiency of this method is also demonstrated in the synthesis of a natural flavoring compound, 3-ethyl-5-methyl-1,2- cyclopentadione (one-pot 53% yield vs a previous four-step route 16% yield from the same starting material). This work is expected to serve as a seminal study toward catalytic ketone α-alkylation with unactivated olefins.

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