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1449213-93-7

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1449213-93-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1449213-93-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,9,2,1 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1449213-93:
(9*1)+(8*4)+(7*4)+(6*9)+(5*2)+(4*1)+(3*3)+(2*9)+(1*3)=167
167 % 10 = 7
So 1449213-93-7 is a valid CAS Registry Number.

1449213-93-7Relevant articles and documents

Asymmetric total synthesis of (?)-javaberine A and (?)-epi-javaberine A based on catalytic intramolecular hydroamination of N-methyl-2-(2-styrylaryl)ethylamine

Uenishi, Saho,Kakigi, Rina,Hideshima, Kumiko,Miyawaki, Akari,Matsuoka, Junpei,Ogata, Tokutaro,Tomioka, Kiyoshi,Yamamoto, Yasutomo

, (2021/05/25)

Asymmetric total synthesis of (?)-javaberine A and its epimer was achieved by utilizing two methods for isoquinoline synthesis, asymmetric hydroamination of N-methyl-2-(2-styrylaryl)ethylamine and Bischler-Napieralski cyclization. Intramolecular asymmetric hydroamination of N-methyl aminoalkene 4 was catalyzed by lithium amide–chiral bisoxazoline to give tetrahydroisoquinoline (S)-laudanosine with good enantioselectivity in excellent yield. N-Demethylation of (S)-laudanosine was accomplished by Polonovski-type reaction to give (S)-norlaudanosine. Condensation of (S)-norlaudanosine with homoveratric acid, and subsequent Bischler-Napieralski cyclization, LiAlH4 reduction, and O-demethylation furnished (8R,14S)-(?)-javaberine A, corresponding to antipode of natural javaberine A. (8S,14S)-(?)-Javaberine A, which corresponds to C14-epimer of natural javaberine A, was also successfully synthesized.

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