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219143-75-6

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219143-75-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219143-75-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,1,4 and 3 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 219143-75:
(8*2)+(7*1)+(6*9)+(5*1)+(4*4)+(3*3)+(2*7)+(1*5)=126
126 % 10 = 6
So 219143-75-6 is a valid CAS Registry Number.

219143-75-6Downstream Products

219143-75-6Relevant articles and documents

A concise synthesis of (-)-mesembrine

Dalko, Peter I.,Brun, Virginie,Langlois, Yves

, p. 8979 - 8982 (2007/10/03)

(-)-Mesembrine 11 was synthesized in 7 steps, in 19.4% overall yield and with ee>95%. The key step of the sequence is a stereoselective alkylation reaction of dianion derived from C2 symmetric imidazolines allowing efficient formation of quaternary benzylic center. Chiral auxiliaries derived from (S,S)-1,2-diamino-1,2-diphenylethane 1a and (S,S)-1,2-diaminocyclohexane 1b were compared. This synthesis provided unambiguous correlation of the newly formed stereocenter.

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