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34880-68-7

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34880-68-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 34880-68-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,8,8 and 0 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 34880-68:
(7*3)+(6*4)+(5*8)+(4*8)+(3*0)+(2*6)+(1*8)=137
137 % 10 = 7
So 34880-68-7 is a valid CAS Registry Number.

34880-68-7Relevant articles and documents

The Catalytic Asymmetric Mukaiyama–Michael Reaction of Silyl Ketene Acetals with α,β-Unsaturated Methyl Esters

Gatzenmeier, Tim,Kaib, Philip S. J.,Lingnau, Julia B.,Goddard, Richard,List, Benjamin

, p. 2464 - 2468 (2018)

α,β-Unsaturated esters are readily available but challenging substrates to activate in asymmetric catalysis. We now describe an efficient, general, and highly enantioselective Mukaiyama–Michael reaction of silyl ketene acetals with α,β-unsaturated methyl esters that is catalyzed by a silylium imidodiphosphorimidate (IDPi) Lewis acid.

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