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52253-57-3

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52253-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52253-57-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,2,5 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 52253-57:
(7*5)+(6*2)+(5*2)+(4*5)+(3*3)+(2*5)+(1*7)=103
103 % 10 = 3
So 52253-57-3 is a valid CAS Registry Number.

52253-57-3Relevant articles and documents

One-step highly diastereoselective synthesis of γ-aminoalkyl-substituted γ-butyrolactones by an asymmetric samarium-mediated ketyl-alkene coupling reaction

Fukuzawa, Shin-Ichi,Miura, Manabu,Saitoh, Takahide

, p. 2042 - 2044 (2007/10/03)

The samarium(II) iodide mediated reaction of N,N-dibenzyl-protected (S)-α-amino aldehydes with (1S,2R)-N-methylephedrinyl acrylate gave the (4R, 1′S)-γ-(aminoalkyl)-γ-butyrolactones in good yields with high diastereoselectivities (up to 80% de); (4R, 1′S)γ-amino-(2-phenylethyl)-γ-butyrolactone (6a), which should be a potent precursor for γ-secretase inhibitors, was obtained with high de value.

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