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220024-53-3

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220024-53-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220024-53-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,0,2 and 4 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 220024-53:
(8*2)+(7*2)+(6*0)+(5*0)+(4*2)+(3*4)+(2*5)+(1*3)=63
63 % 10 = 3
So 220024-53-3 is a valid CAS Registry Number.

220024-53-3Upstream product

220024-53-3Relevant articles and documents

Asymmetric strecker-type reaction of α-aryl ketones. Synthesis of (S)- αM4CPG, (S)-MPPG, (S)-AIDA, and (S)-APICA, the antagonists of metabotropic glutamate receptors

Ma, Dawei,Tian, Hongqi,Zou, Guixiang

, p. 120 - 125 (1999)

Heating a mixture of α-aryl ketone with (R)-phenylglycinol produces a mixture of imine and 1,3-dioxazolidine. Treatment of this mixture with trimethylsilyl cyanide followed by transformation of nitrile to ester gives Strecker-type reaction products. The diastereoselectivity of the generated α-amino esters is from 2/1 to 7/1, and the (R,S)isomer is found as the major product. The (R,S) and (R,R)isomers can be separated by conversion to their N-Cbz or cyclization derivatives. Using this methodology, four antagonists of metabotropic glutamate receptors, (S)-αM4CPG, (S)-MPPG, (S)AIDA, and (S)- APICA, are synthesized.

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