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136667-12-4

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136667-12-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136667-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,6,6 and 7 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 136667-12:
(8*1)+(7*3)+(6*6)+(5*6)+(4*6)+(3*7)+(2*1)+(1*2)=144
144 % 10 = 4
So 136667-12-4 is a valid CAS Registry Number.

136667-12-4Relevant articles and documents

Catalytic asymmetric protonation of silyl ketene imines

Guin, Joyram,Varseev, Georgy,List, Benjamin

supporting information, p. 2100 - 2103 (2013/03/28)

An efficient catalytic and highly enantioselective protonation of silyl ketene imines is described. The reaction is catalyzed by the chiral phosphoric acids TRIP or STRIP in the presence of a stoichiometric amount of methanol as the proton source and silyl acceptor. A variety of substituted racemic silyl ketene imines have been transformed into highly enantioenriched nitriles.

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