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177948-63-9

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177948-63-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177948-63-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,4 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 177948-63:
(8*1)+(7*7)+(6*7)+(5*9)+(4*4)+(3*8)+(2*6)+(1*3)=199
199 % 10 = 9
So 177948-63-9 is a valid CAS Registry Number.

177948-63-9Relevant articles and documents

A new chiral synthesis of Wieland-Miescher ketone catalyzed by a combination of (S)-N- benzyl-N(2-pyrrolidinylmethyl)amine derivative and bronsted acid

Akahane, Yuichi,Inomata, Kohei,Endo, Yasuyuki

experimental part, p. 1065 - 1078 (2010/10/03)

New or known N-benzyl-N (2-pyrrolidinylmethyl)amine derivatives bearing a variety of substituents on the aromatic ring were easily prepared from N-Boc-proline or NBoc-prolinol. The enantioselectivity of the intramolecular asymmetric aldol reaction mediated by a combination of the amine derivative and Bronsted acid to prepare Wieland-Miescher ketone was examined in detail. During the examination, remarkable substitutional effects on the aromatic ring were observed. Development of a catalytic version of the reaction was successfully achieved by the use of N(9-anthracenyl)methyl-N(2-pyrrolidinyl-methyl)amine in the presence of dichloroacetic acid.

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