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154161-00-9

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154161-00-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 154161-00-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,4,1,6 and 1 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 154161-00:
(8*1)+(7*5)+(6*4)+(5*1)+(4*6)+(3*1)+(2*0)+(1*0)=99
99 % 10 = 9
So 154161-00-9 is a valid CAS Registry Number.

154161-00-9Relevant articles and documents

Highly Stereoselective Synthesis of cis-(2R,3S)-3-Hydroxyproline

Jurczak, Janusz,Prokopowicz, Piotr,Golebiowski, Adam

, p. 7107 - 7110 (1993)

Allyltrimethylsilane (5) reacted with N-carbobenzoxy-O-tert-butyldimethylsilyl-L-serinal (4) to give with high diastereoselectivity syn-adduct 3 which was subsequently transformed into cis-(2R,3S)-3-hydroxyproline (1).

The stereochemical course of addition of allyltrimethylsilane to protected L-alaninals and L-serinals in the presence of Lewis acids. Total synthesis of cis-(2R,3S)-3-hydroxyproline

Gryko,Prokopowicz,Jurczak

, p. 1103 - 1113 (2007/10/03)

The influence of Lewis acids on the diastereoselectivity of the addition of allyltrimethylsilane to variously protected L-alaninals and L-serinals was investigated and high levels of asymmetric induction were achieved. Stereochemical models for rationalisation of the results obtained are proposed. cis-(2R,3S)-3-Hydroxyproline was synthesised starting from N-Cbz, O-TBS-L-serinal, in which the crucial step involves addition of allyltrimethylsilane to the aldehyde in the presence of SnCl4.

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